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(443 ratings)
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ZINUS 7 Inch Metal Smart Box Spring / Mattress Foundation / Strong Metal Frame / Easy Assembly, King

4.5 4.5 out of 5 stars 17,837 ratings

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King
Original

Purchase options and add-ons

Size King
Product Dimensions 79"L x 76"W x 7"H
Special Feature Durable
Color Grey
Finish Type Steel
Material
Steel
Style
Original
Maximum Weight Recommendation
350 Pounds
Item Weight
47.02 Pounds

About this item

  • Modernize your bedroom with the elegant design of this gorgeous platform bed. The neutral color paired with the sophisticated decorative touches make this bed foundation a great choice for any décor.Item Dimensions : 79"L x 75.5"W x 7"H.Maximum weight recommendation:700 pounds
  • DURABLY ENGINEERED - Durable steel is used to construct the inside framework of this foundation; twin size supports a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs
  • THOUGHTFULLY PACKAGED - All parts, tools and instructions are packed into one compact box that ships straight to your door
  • Box spring only, a bed frame or platform bed is required to support this foundation and is sold separately
  • Worry-free 5 year limited warranty included. King: 79" X 76" X 7", 43.98 lb
See more product details

Customer ratings by feature

Sleep quality
5.0 5.0
Easy to fold
5.0 5.0
Light weight
4.7 4.7
Sturdiness
4.4 4.4

Frequently returned item

Check the product details and customer reviews to learn more about this item.

79" 76" 7" 79"

Frequently bought together

$155.00
Get it as soon as Wednesday, Mar 27
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ZINUS 7 Inch Metal Smart Box Spring / Mattress Foundation / Strong Metal Frame / Easy Assembly, King
Zinus ZINUS 7 Inch Metal Smart Box Spring / Mattress Foundation / Strong Metal Frame / Easy Assembly, King
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Price$155.00-17% $112.49
List:$135.00
-26% $122.33
List:$165.00
$145.99$134.99$139.99
Delivery
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Customer Ratings
Sturdiness
4.4
4.4
4.4
3.7
4.1
4.9
Easy to assemble
4.3
4.3
4.2
3.8
4.1
4.7
Maneuverability
4.3
4.3
4.3
4.9
Sleep quality
5.0
5.0
3.7
Easy to fold
5.0
5.0
3.7
Sold By
Amazon.com
Amazon.com
Amazon.com
EZBeds
Aardhen
xmxumao
size
King
Full
King
King
King
King
material
Steel
Steel, Fabric
Steel, Fabric
Metal
Metal
Metal
max. recommended weight
350 pounds
700 pounds
700 pounds
3000 pounds
400 pounds
3000 pounds
weight
47.02 pounds
35 pounds
42.78 pounds
46.35 pounds
26 pounds

From the manufacturer

Smart BoxSpring
available in 5, 7 and 9 inches profiles
Original Smart Box Spring comparison
Stong Support fo a Good Night's Sleep
boxspring metal frame

Strong, Stable and Sturdy

Built to Last

Unlike a traditional box spring, this cleverly crafted foundation is made with a thick and sturdy steel frame for ultimate strength and longevity.

quick assembly icon

Handyman Skills Not Required

Build It, Stress-Free

All tools, parts and instructions are conveniently packed into one box for set-up that takes less than an hour with a friend's help. Now that's what we call smart!

Are any tools required to assemble my box spring?

This box spring is shipped with everything you need to assemble it - all parts, tools and instructions can be found efficiently packed in the shipping box.

Does this box spring require a bed frame?

A basic metal bed frame or platform bed is required to support this box spring. Add your mattress, and you've got the dynamic trio for rock solid support.

What kind of mattress can this box spring support?

Our box springs are designed to do it all! Rest your memory foam, latex or spring mattress on top for smooth snoozing.

What is the distance between slats?

For Twin and Full sizes, spacing is 6.3 inches. For Twin XL, Queen and King sizes, spacing is 6.7 inches. For California King size, spacing is 7.2 inches.

Looking for specific info?

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Regardless of your statutory right of withdrawal, you enjoy a 30-day right of return for many products. For exceptions and conditions, see Return details.
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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ZINUS

ZINUS 7 Inch Metal Smart Box Spring / Mattress Foundation / Strong Metal Frame / Easy Assembly, King


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From the brand

Product Description

We like to think of a box spring as the backbone for your mattress. The best kind should be flat, level and built to keep your mattress in tiptop shape; and that’s just what the Smart Box Spring does! With its easily assembled, dependable steel structure, you can rest assured that your mattress will be sitting pretty. An included poly jacquard cover blends with the rest of your bedroom, and with a variety of different thicknesses to choose from, you can pick the one you need to customize the height of the bed. All packed in a compact shipping box with everything included, even our 5-year worry free warranty! Now that’s peace of mind you can sleep on.

Product guides and documents

Customer reviews

4.5 out of 5 stars
4.5 out of 5
17,837 global ratings

Customers say

Customers like the ease of assembly of the bed frame. They mention that the instructions are clear and easy to understand. They also appreciate the durability, performance, and value of the product. They say that it works awesome, serves its purpose, and is a great product for the price. Customers are also satisfied with portability, and quality. However, some customers disagree on fit and noise.

AI-generated from the text of customer reviews

1,706 customers mention1,456 positive250 negative

Customers find the bed frame easy to assemble. They say the instructions are clear and easy to understand.

"...I was skeptical about buying a boxspring in pieces but the assembly is fairly easy if YOU FOLLOW THE PICS NOT THE WORDS...." Read more

"...The instructions are super clear and easy to understand...." Read more

"...If you're looking for a hassle-free assembly, solid construction, and a budget-friendly option, the ZINUS 7 Inch Metal Smart Box Spring is an..." Read more

"...The assembly was quick and easy - I was able to set it up in just a matter of minutes, without any tools...." Read more

1,224 customers mention1,025 positive199 negative

Customers like the durability of the bed frame. They say it's very sturdy, the quality of the build is excellent, and the craftsmanship impressed them. They find it to be sturdy for sleep, a solid purchase, and that it will last for years and years. Customers also say the powder coating on the pieces feels high quality, and they did not notice a single sharp edge or corner.

"...I am full figured and hubby is a rough sleeper and this sturdy assembly holds us well I have it placed on a platform frame I also bought here and..." Read more

"...Very, very strong metal frame - great for those of us who might not have great luck with things falling etc that might compromise a lesser frame!" Read more

"...If you're looking for a hassle-free assembly, solid construction, and a budget-friendly option, the ZINUS 7 Inch Metal Smart Box Spring is an..." Read more

"...The design of this box spring is quite smart, too. The metal frame is well-crafted and the corners are reinforced to prevent any wobbling or shaking...." Read more

403 customers mention365 positive38 negative

Customers are satisfied with the performance of the bed frame. They mention that it serves its purpose, is easy to set up, and works well as a mattress support. Some say that the product is amazing and works great on the floor.

"...In the end, I got the thing together, and it seems to work fairly well, although it makes a few strange creaks when you turn over in bed...." Read more

"...It works great and my bed is finally flat and my back pain is gone." Read more

"...as I have a king bed and was afraid it would not hold up but it works awesome." Read more

"It cant be used a base but works well as a mattress support. Easy to put together...." Read more

395 customers mention395 positive0 negative

Customers appreciate the value of the box spring. They say it offers quality at a fair price. Customers also mention that it's an affordable option for a box spring and is sturdy.

"...looking for a hassle-free assembly, solid construction, and a budget-friendly option, the ZINUS 7 Inch Metal Smart Box Spring is an excellent choice...." Read more

"...It's a great value for the price, and it has exceeded my expectations in terms of quality and durability." Read more

"...Overall, it is very strong and affordable. Here is the best part...." Read more

"...can slog through the assembly, this is a worthwhile product and offers a good value." Read more

227 customers mention183 positive44 negative

Customers like the portability of the bed frame. They say it's easy to assemble, not too heavy, and easy to haul down stairs. Some say it comes in a heavy box that had all items well protected. Customers also say it is easy to maneuver onto the bed and a nice substitute for a wood box spring.

"...Not only it arrived in time but it was also well-packed. It is heavy and you will need 2 people to carry the box from outside to your bedroom...." Read more

"...The pieces are all light but quite sturdy. I wanted a solid surface for a memory foam bed, and this seems to fit the bill...." Read more

"It’s a nice substitute for a heavy box frame. I put a thin sheet of finished plywood on top to even out the support for the mattress inner springs...." Read more

"Easy assembly and not too heavy. This provides enough stability under a memory foam mattress. Happy with the design and the result it gives." Read more

180 customers mention174 positive6 negative

Customers are satisfied with the quality of the bed frame. They mention that it is sturdy, impressive, and perfect for their needs. Some say that it makes their mattress super study and corrects where it had been sagging. Overall, most are happy with their purchase and recommend it to others.

"...The numbering is critical and very helpful. However, it's a dark green sticker on a black surface and, amazingly, it's hard to find the sticker...." Read more

"Great frame. It was very easy to assemble, everything clicks into place so there is no need for tools and it took me under 10 min to put together...." Read more

"...Nothing else to say other than they’re fine and does the trick for a mattress foundation!" Read more

"...Way better than my old wooden one. Great for the new bed. Thank you!" Read more

377 customers mention217 positive160 negative

Customers are mixed about the fit of the bed frame. Some mention that it fits perfectly on their metal bedframe and sturdy enough to support their mattress. However, others say that the steel bar was bent and did not fit as the others did, they had issues getting the bars to fit in properly, and the cover was slightly undersized.

"...My daughter and I lifted it up and placed it on her queen bed. It fit perfectly. We then put the mattress and lied down on it...." Read more

"...At first I thought the cover was slightly undersized, but after getting all of the corners on, the material on the edges curves up over the top just..." Read more

"...It’s perfect. It sits perfectly on the support boards underneath and is exactly what I wanted." Read more

"...the zip ties bundling things together had broken, and the contents were scrambled together. Assembly was the next problem...." Read more

235 customers mention161 positive74 negative

Customers are mixed about the noise of the bed frame. Some mention that there are no noises what so ever, and the foundation is sturdy. However, others say that it makes a slight creaking sound when they move around in bed. The metal squeaks, and it makes the box spring make noise as if you had it for years.

"...It is very sturdy and does not squeak upon rolling. Overall, it is very strong and affordable. Here is the best part...." Read more

"...each other when everything was assembled, but I think it'll be nice and quiet...." Read more

"...giving this product a perfect 5-star rating is that it does make a slight creaking sound when I move around in bed...." Read more

"...It was easy to put together, and it feels sturdy. Finally no more noise! The only reason I didn’t give five stars, I wish the cover encased all of it." Read more

Great Product - Challenging Directions
4 Stars
Great Product - Challenging Directions
To be sure, this is a rock solid, quality product that will last for years and years. Getting it assembled, however, is a chore. I've read the other reviews where someone says something like..."It's so Easy! It only took me 30 minutes." My experience is different. Clearly, the folks at Zinus really tried to make it easy, but they failed. Let me take you through it...1) The directions. As you can see in the photo, for step one, you are to assemble 2 components together. In the bottom left, there is a diagram of what it is supposed to look like when it's fully assembled with 2 red check marks to indicate the 2 components you're supposed to be working on. Well, that's nice, but all of the components in the diagram are the same black color and they are going every which way so it's REALLY tough to figure out the orientation of the 2 components you're working on in this step and all the rest. It would be AWESOME if Zinus grayed out all the components you aren't supposed to be working on and the only 2 you're supposed to be working on were black. That way, you can tell the orientation of your work for this step.2) The hardware kit. As you can see of the other photo, I have a copy of the directions on top and the hardware kit on the bottom. The directions indicate I am supposed to have 10 nuts labeled "G" (I've highlighted it in pink). When you look at the hardware kit, nothing is labeled "G". However, there are 10 nuts labeled "H" (also highlighted in pink). Well, G and H are next to each other in the alphabet - I don't know how Zinus missed this.3) More on the hardware kit. They provide this very nice little ratchet device to assemble it. They also provide a stamped-out-of-a-metal-sheet little wrench which isn't worth anything at all. If Zinus goes to the trouble of providing the nice ratchet device, please provide a worthwhile wrench.4) Final comment on the hardware kit. It's nice to have everything labeled and to even have some spare parts labeled as "spare parts." A nice touch. Regrettably, you need to take out multiple components at the same time and when you punch them out of the back of the blister pack, now you have a whole bunch of nuts and bolts scattered all over the place. It would be awesome if Zinus provided the hardware in little individual, labeled bags.5) The stickers - Each components that you put together is labeled with a yellow "up" sticker and it's really helpful. Kudos for that. Each component is also labeled with a dark green sticker with a number on it. The numbering is critical and very helpful. However, it's a dark green sticker on a black surface and, amazingly, it's hard to find the sticker. I don't know why they don't make it dayglow orange - no one is ever going to see it after it's assembled, and it would make it so much easier to see during assembly.6) Finally, the cards. Zinus includes several "thank you" and "Hello!" cards that you can send to friends and family. Presumably so you can tell everyone about the great Zinus product you just bought. Anytime I have purchased a thank you note card, it always comes with an envelope. Zinus missed this - not an envelope anywhere. What am I supposed to do with these now? I tossed them. If Zinus doesn't want to incur the extra cost of a few envelopes, then a post card would work. I thought this a bit weird though - do people still send letters and notes in the mail?All in all, if you can slog through the assembly, this is a worthwhile product and offers a good value.
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Top reviews from the United States

Reviewed in the United States on February 5, 2024
Size: QueenStyle Name: OriginalVerified Purchase
Reviewed in the United States on February 19, 2024
Size: FullStyle Name: New/upgraded with quick assemblyVerified Purchase
Reviewed in the United States on December 29, 2023
Size: KingStyle Name: New/upgraded with quick assemblyVerified Purchase
One person found this helpful
Report
Reviewed in the United States on April 27, 2023
Size: QueenStyle Name: New/upgraded with quick assemblyVerified Purchase
6 people found this helpful
Report
Reviewed in the United States on February 24, 2020
Size: QueenStyle Name: OriginalVerified Purchase
6 people found this helpful
Report

Top reviews from other countries

Sedatious
5.0 out of 5 stars Fantastic replacement for a standard wooden framed box-spring.
Reviewed in Canada on February 27, 2023
Size: QueenStyle Name: OriginalVerified Purchase
3 people found this helpful
Report
E.Smith
5.0 out of 5 stars Recommend this
Reviewed in Canada on February 11, 2024
Size: KingStyle Name: OriginalVerified Purchase
Michael Hicks
4.0 out of 5 stars Excellent Zinus product, but...
Reviewed in Canada on March 16, 2022
Size: QueenStyle Name: OriginalVerified Purchase
One person found this helpful
Report
Troya
5.0 out of 5 stars Affordable, functional and easy to assemble!
Reviewed in Canada on March 10, 2024
Size: QueenStyle Name: OriginalVerified Purchase
Amber Kendall
5.0 out of 5 stars So far, so good.
Reviewed in Canada on February 11, 2024
Size: KingStyle Name: OriginalVerified Purchase