ZINUS 9 Inch Metal Smart Box Spring, Mattress Foundation, Strong Metal Frame, Easy Assembly, King
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Availability:
Only 7 left in stock, order soon!
Arrives
Friday, Oct 2
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Size: King
Style: Original
Features
- Steel Interior Frame With Knitted Polyester Cover
- Strong and Sturdy metal structure
- Convenient and compact packaging
- All tools included for easy assembly
- 5 year warranty
- 76"x79"x9"
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.
Size: King
Material: Steel
Style: Original
Special Feature: Easy assembly
Color: Grey
Other Special Features of the Product: Easy assembly
Included Components: Box Spring
Brand Name: Zinus
Unit Count: 1 Count
Manufacturer: Sleep Revolution
Number of Packs: 1
UPC: 841550068641
Number of Items: 1
Global Trade Identification Number: 41
Manufacturer Warranty Description: Worry-free 5 year limited warranty included.
Target Audience: unisex-adult
Item Type Name: Box Spring
Model Number: OLB-ABS-9K
Manufacturer Part Number: OLB-ABS-9K
Set Name: King
Assembly Instructions Description: Included
Style Name: Original
Color: Grey
Finish Types: Metal
Furniture Finish: Metal
Form Factor: Rectangular High-Profile Box Spring
Shape: Rectangular
Compatible With Mattress Size: King
Maximum Weight Recommendation: 700 pounds
Size: King
Item Weight: 45 pounds
Item Depth: 9 inches
Item Dimensions: 79 x 75.5 x 9 inches
Material Type: Steel
Product Care Instructions: Wipe with Damp Cloth
Headboard Material: Metal
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Oct 2
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Size: Queen
Style: Original
This product is great, I am 100% satisfied with this purchase. I am using this box spring with a Nature Sleep memory foam mattress. If you have an innerspring mattress your mileage may vary. My review as follows will cover several different aspects of this product and why they are great. Portability: Who knew you could assemble a box spring instead of lugging around a 50+ pound bulky wooden frame? Once assembled, the frame is lightweight and much easier to move around than a traditional box spring. The next time I move I am just going to take it apart instead of it taking up space in the moving truck, very economical in that sense. Assembly: Assembly was very easy, no mechanical inclinations required from the assembler. The set comes with an allen wrench/hex key and you use that to hold bolts in place while you tighten wingnuts with your fingers. Please ignore any reviewer of this product who said it was too difficult to assemble, took too long, or had confusing instructions, they are either lazy or completely incompetent. It took me about an hour to assemble by myself, and it would have taken even less time if I hadn't been half watching TV and drinking a beer while I was putting it together. The instructions aren't written words, but pictures showing which pieces to assemble with which bolts, but if you ever built a Lego set when you were a kid you should be able to handle this. It is easy to tell which pieces should be facing up during assembly, because most have a 'this side up' sticker. The pieces that don't, it either doesn't matter which side is up or you can tell which side should be up because of the notches the slats will fit into at the end. The Cover/ Looks: The zip cover looks nice and the white sides are a soft plush. Make sure you sweep your floor before zipping the cover on though or you might get dirt all over the nice white part. Some people said that the cover ripped when they were zipping it up, that was not the case for me. The cover is a very tight and perfect fit, but the white sides stretch. So when you zip it on, don't just yank on the zipper as hard as you can, pull up on the white parts that stretch and it will make the zipper easier to close. Durability: It seems sturdy enough to me. I have had for two weeks, no complaints. I have unzipped and re-examined the frame and it has not bent or buckled under the weight of two people or any vigorous activity. Could you bend the metal of the frame after you put it together? I guess you could if you tried to, but why would you do that deliberately? Putting a mattress on top of it and using as intended should leave you with no issues. I hope this review provided all the information needed to help in your purchase decision, and I am sure you will be satisfied with this box spring.
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Reviewed in the United States on April 29, 2015 by Brad
Size: King
Style: Original
Loved the fact that it arrived in a compact box making it very manageable to carry through the house and into the bedroom as I have a very small and constricted floor plan. Upon opening the box it seemed a bit overwhelming but once I looked at the instructions and the diagram of the labeling of the pieces I was very impressed with how easy it was to lay out and put together. All the hardware fit smoothly and was easy to put together using only the tools that were supplied. That in itself was a touch of class, to be provided those items and not have to find and size up my own tools. The quality of the hardware as well as the packaging was well thought out and I appreciated the extra nuts and bolts. I actually used the extra nuts to double nut the two long bolts that secured the middle cross members together in the center of the box to ensure they don't work their way loose over time. The nuts and bolts looked to be well made and the shouldered and serated locking surfaces of the nuts weren't lost on me. That was a great selection of fasteners. The bolts were made very well and the heads did not ring out or become deformed from being tightened and kept their integrity and shape so as to be removed for disassembley in the future if needed. All the frame work pieces had a very nice finish to them appearing to be powder coated. The final addition of the frame cover was an added item that enhanced the overall quality and appearance of the total package once it was fully assembled. Total assembly time was no more than an hour by myself and being put together on and inside an existing raised oak bedframe with large headboards and side rails. Very pleased with this excellent product and would most definitely buy again and recommend to others looking for a similar item to fit their needs and lifestyle.
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Reviewed in the United States on June 8, 2025 by Dean W. Edwards Jr.
Size: King
Style: Original
Sturdy, well made and so easy to put together. I am a very petite 62 yr old lady and I was able to put this together in no time. Very pleased with my purchase. This is the second Zinus product I have purchased. Would 100% recommend.
Reviewed in the United States on September 4, 2026 by Bev Stiverson
Size: King
Style: Original
I was replacing a broken king sized box spring, and this came in handy. After going to several mattress stores and being told they would start at $300 just for the box spring, I decided to look at Amazon for a platform bed, and this box spring came up as I was searching. It was the answer to my issue. I carefully read many of the reviews for this frame and decided to purchase the frame anyway. It was really easy to put together and feels very sturdy. I did have an issue with one joint being crooked and not fitting together, and since I was more than halfway done, and all of the pieces were out, I chose to force the pieces together and put the bolt in there anyway. PLEASE LOOK AT ALL PIECES VERY CAREFULLY!!! I read that this happens, but I still didn't want to mix things up and only worked on a section at a time. Secondly, the cover that zips over the frame was too small. The zipper started tearing, and when we got to the second part, it was no way the cover was going to fit. I am contacting the manufacturer to send me a different cover. Other than that, the frame was super easy to put together and feels very sturdy. I would buy it, but just remember to inspect the pieces. UPDATE: I moved and my new place I had to take the bed upstairs. I couldn't get it upstairs without breaking it down into two large pieces. I couldn't figure it out at first, but after looking through the manual again, it broke down and was reassembled easily. Also when I took it apart I was able to inspect the frame and NO SAGGING anywhere. I am a 300lb+ woman and my partner isn't a small fry either and there have been plenty of horizontal aerobics and never felt like it was going to break down. I paired this with a basic bed frame from Amazon and haven't had any issues.
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Reviewed in the United States on July 30, 2016 by Shaundra
Size: Queen
Style: Original
It is rare when I take the time to sit down and write a review but this time I felt it was necessary. We needed a new box spring as my wife and I are like giant children. We jump around, we wrestle, and we've cracked the boards in our current box spring to the point that the mattress sinks in the middle. I was soooooo close to ordering a box spring from mattress warehouse when I thought to myself "I wonder if Amazon sells box springs". This product was the first to show up, and I questioned buying it because of all of the negative reviews. "The product isnt to size, the product is missing parts, it's difficult to assemble, it's impossible to get the cover over it, etc." I took a shot because I figure I'm pretty handy and we were in desperate need. Opening the box is quite overwhelming due to the amount of parts, but a simple glance at the directions put me at ease. While the parts aren't labeled "a,b,c" physically on them, it doesnt take a rocket scientist to look at what's in front of you and match it to the picture. I didn't use the tools that came with the kit because I have my own. If I used their tools of course it'd be a pain in the ass, but what would you expect from a dinky little hex key and flat wrench. That is the standard basic tools set you get in EVERY SINGLE build it yourself furniture item. Obviously their tools are no different and they are trash, but you should know that already. The build took me roughly 25 minutes as there are a total of 14bolts and 10 nuts that you have to put in place. So far no issues at all to my surprise, everything was smooth as silk. Then came the "hard part" putting the cover onto the box spring. The panic began to set in as I have been told by so many reviewers that this was a huge deal and i would struggle. Again to my surprise I had zero issues whatsoever and it slid on with ease. So how did I do it you ask? Logic told me the easiest way to do this was to stand the frame upright. Since everything was very well secured in place (to my surprise) there was no reason why I couldn't do this. I placed the cover over the top 2 corners, zipped it slightly and moved down to the bottom. The only "issue" was that I was by myself, so when I was pulling the cover over the bottom, I almost tipped the frame over into my TV. That said, if you have someone to hold it for you, you won't have a problem. I cant speak on behalf of the quality as I just received it and built it today so that will be a follow up review. As far as building it, if you can follow instructions with or without your own tools a child can put this together. (With your own tools makes it easier, but not required.) I used a screwdriver with a hex key insert, and a socket wrench.
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Reviewed in the United States on April 4, 2018 by Amazon Customer
Size: Queen
Style: Original
***UPDATE 1/22*** Still love this box spring. No sagging whatsoever, still providing great support. We've moved twice since purchasing and breaking it down and reassembling a breeze! LOVE this box 'spring'. For every review that is complaining about how heavy the box is; I'm going to need you to stop and think. This is a metal frame NOT a traditional wood box spring, of course, it's heavy. Please read the weight of the package. This was pretty easy to assemble even without words. There were one or two snags. In step one, the image looks as though there are nuts to be applied to the screw, this is not so. Then the images for steps 3 & 4 seemed to indicate you needed more nuts than you actually have. The M screws just like the L screws do not call fur nuts. So if you have ten nuts you are all good. Even with those moments of confusion still easy to assemble. Took about 30 minutes from start to finish and that was with a 5-year-old running around insisting on 'helping'. It was easy peasy to get the cover over the metal frame, zipped up with no issue. However, if you really find this to be too much of a hassle just buy a bedskirt and be done. This is providing us sooooo much more support than our old box spring (to be fair that thing was a decade old and its spring had long sprung). As my other half and I are both weight gifted, I really wanted to go with this box spring in hopes that it would handle our weight better than a traditional box spring. Only time can really tell on that front, but I am pleased thus far. We are using a Zinu 12 inch mattress and could not tell that we were laying on metal. Gave the mattress just the right amount of firmness. I slept so well last night I almost cried when my alarm went off and I had to get up this morning. I'm sure at some point we are going to have to move again. I like the fact that we can deconstruct this, thus saving room in a moving truck when packing. Suggestion, do not remove the up stickers on the frame so that when it comes time to reassemble you'll know which way to put the pieces. Add to all of that that this was cheaper than any box spring that I could locate at my local furniture stores. I'm one happy camper.
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Reviewed in the United States on February 2, 2018 by Rhenish
This is the second box spring of this type that we've purchased. The first was for a queen 8" memory foam mattress in our guest bedroom. No complaints from our guests. We have a Tuft & Needle california king mattress in our bedroom, and while we're only two days in with this box spring underneath it, so far the results have been great. The Good: - I wouldn't normally review shipping, but I think in this case it's actually a big selling point for this product. This can be shipped normally to your house, meaning there's no freight delivery to deal with. No appointments to set up, no having to be home when it gets there. - Relatively easy to assemble. I did it myself in about half an hour. Definitely use your own drill and/or ratchet set if you have it. They provide tools but it would make the assembly process longer if you used them. - Seems to be plenty of support so far on the mattress. No problems at all sleeping on it. Again, we have a 10-inch Tuft & Needle memory foam mattress. - Lightweight compared to other box springs. I actually got it on the bed and set up by myself, although I'd recommend two people do it. In any case, it's pretty easy to move around compared to a wood foundation of this size. - The price. Looked at some other, more traditional box springs (which for california king usually end up being two separate pieces) and they seemed to be priced somewhat higher than this. The Bad: - Not sure if there are any bad items. You do have to assemble yourself, but you know that going in. The instructions aren't the clearest, but it's fairly easy to figure out. Overall: Like I said, we now have two of these in different sizes and have been happy with both. If you don't have any issues assembling it, I'd say it's a good buy, and based on the research I did, pretty competitively priced compared to other box springs.
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Reviewed in the United States on May 17, 2017 by qzik7777
Size: Full
Style: Original
These box springs are light weight yet incredibly sturdy. It is so easy to put together it literally only takes about 10 minutes. We liked this box spring so much we have not purchased them for other bedrooms in our house. It is sold at a very reasonable price point. One of my sons is a 6'3" rugby player and multiple wood box springs had broken under his mattress but this one has held up for years now. Highly recommend!
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Reviewed in the United States on March 24, 2026 by BLAIR T