ZINUS Metal Box Spring with Wood Slats /4 Inch Mattress Foundation/Sturdy Steel Structure/Easy Assembly, King
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Availability:
In Stock.
Arrives
Aug 30 – Sep 1
Color: White
Size: King
Style: 4 Inch
Pattern Name: Box Spring Only
Features
- Steel Interior Frame With Wood Slats and a Knitted Polyester Cover
- A MATTRESS GAME-CHANGER - The Walter is built with all of the trusted support we put into our ever-so-popular platform beds, and this box spring has the total package - an unwavering steel structure, reliable, closely spaced wood slats and a cleverly developed, well, package
- DURABLY ENGINEERED - Durable steel and wood slats are used to construct the interior framework of this foundation; slats are spaced 2.5 - 2.9 inches apart; twin size supports a maximum weight capacity of 250 lbs, while all other sizes can support up to 500 lbs
- LOW PROFILE DESIGN - A 4 inch height is perfect for taller mattresses or for those who enjoy their bed lower to the floor
- THOUGHTFULLY PACKAGED - All parts, tools and instructions are packed into one compact box that ships straight to your door
- Worry-free 5 year limited warranty included; box spring only, a bed frame or platform bed is required to support this foundation and is sold separately
Description
Chances are you’ve spent a long time picking out your ideal mattress. So why not put it on top of a foundation that will do it justice? The Metal Box Spring with wood slats is designed to steadily support your beloved mattress, be it spring, latex or memory foam. And with its proven solid steel structure and closely spaced wood slats, it’s a base you can sleep on with total confidence for the long haul. Created to fit in one package with everything you need and assembly that only takes a few steps to complete, this one is a slam-dunk in a box. Three different profile heights make it easy to choose the one that suits your setup, and its worry-free 5 year limited warranty means that we’ve got your back (literally and figuratively!).
Size: King
Material: Alloy Steel
Product Dimensions: 78.7"L x 75.5"W x 4"H
Style: 4 Inch
Special Feature: Sturdy
Other Special Features of the Product: Sturdy
Included Components: Foundation, Wood Slats, Cover
Brand Name: Zinus
Manufacturer: Zinus
UPC: 841550200430
Global Trade Identification Number: 30
Manufacturer Warranty Description: Worry-free 5 year limited warranty included.
Item Type Name: Metal Box Spring with Wood Slats
Model Number: AZ-HBBS-4K
Manufacturer Part Number: AZ-HBBS-4K
Set Name: King Bed Set
Material Type: Alloy Steel
Product Care Instructions: Wipe with Dry Cloth
Style Name: 4 Inch
Color: White
Finish Types: Steel,Wood
Furniture Finish: Wood slats
Form Factor: Box Spring
Shape: Rectangular
Compatible With Mattress Size: King
Maximum Weight Recommendation: 700 pounds
Size: King
Item Dimensions L x W x H: 78.7"L x 75.5"W x 4"H
Item Weight: 58.9 pounds
Ground To Item Distance: 4 inches
Item Depth: 4 inches
Item Dimensions: 79 x 75.5 x 4 inches
Assembly Instructions Description: Included
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Aug 30 – Sep 1
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
Color: White
Size: Queen
Style: 4 Inch
Pattern Name: Box Spring Only
I ordered this Zinus Metal Box Spring with Wood Slats to support a new hybrid mattress. The wood slats are wide and sturdy and provide more support for the mattress than the other model box springs with only 2 inch wide metal slats. The distance between the wood slats is about 3 inches so this meets various mattress manufacturer requirements. The box spring is 4 inches tall which is a plus because the bed will not be so high as most mattresses are now 14 inches or thicker. The construction is all metal (except for the wood that goes across). The entire thing is covered by the nice fabric cover that is white. Well worth the price. The product can be assembled in about 30 minutes and includes the tool necessary. Can be assembled by one person.
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Reviewed in the United States on July 15, 2026 by USABuyer
Color: White
Size: Queen
Style: 4 Inch
Pattern Name: Box Spring Only
We really appreciated how easy this frame was to assemble. The directions were clear, and all of the pieces fit appropriately. The ratchet tool was included which was a nice surprise. The slats are connected to each other, and all you have to do is unroll them. The slats easily attach to the frame by Velcro. We like the cover that was included, and it seems thick and sturdy. I’m pleased that our top mattress is now four to five inches lower with this frame, and I don’t have to hop up to get in bed anymore. Overall, we are very happy with our purchase and can definitely recommend this frame.
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Reviewed in the United States on June 28, 2026 by K.L.
Color: White
Size: King
Style: 7.5 Inch
Pattern Name: Box Spring Only
Just want to start out by saying the slats are super sturdy and fluctuate between 2.5 and 2.75 inches (most foam bed manufacturers require a maximum of 3" between slats for warranty reasons). Okay, now that THAT’S out of the way. This Box spring/Box Frame is AMAZING. I never leave 5 star reviews except for items I think go above and beyond and this one sure does. The design and thought that went into this thing are superb. Extremely easy assembly, extremely sturdy yet super light and super rigid. It even comes with an amazing little allen wrench ratchet tool (pictured). The sides have velcro on them which attaches to Velcro strips which are stapled to the slats, and the slats themselves come in two separate sections. the design is perfect in that you simply grab a section of flats and "roll" it out and stick it to the velcro on the frame which holds it in place. The instructions were clear as far as putting the pieces together and really the ONLY thing I would say that could use improvement is the cover itself. Its designed in a way that it zips on three sides and you "wrap" it around the frame and zip it up, the issue is that when you do this you have to have two people: one to hold the frame up and the other to pull it through along the bottom. Once you do get the bottom section of the cover under the frame itself, everything gets easy and you simply zip it on up. I know this is "simply" a box spring, and maybe I am just so used to the old crappy styles. But this one is WELL worth the money. Strong, Stable, easy to assemble, perfect for foam beds, comes in a relatively small box. You cant go wrong with this one, and I will be buying again if I am ever in need of a box spring in the future.
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Reviewed in the United States on February 18, 2019 by Nick T.
Color: White
Size: Queen
Style: 4 Inch
Pattern Name: Box Spring Only
Actually very impressed with this box spring. It's not your traditional box spring; I think it's actually considered a bed foundation. Anyway, I have this furniture set (on of those real wood sets with the glass detailing that everyone hates but I still obsess over) that I've held onto since I was in high school and for years, my custom-ordered foundation was wonderful untillll a few weeks ago when my movers snapped the steel frame (which is kind of funny). Anyway, I was looking for the exact same foundation when I found out that the one I had was custom ordered and the company is no longer in business (very fml moment). But, after some digging, and reading countless blogs about the best bed foundations (boring), I came across this brand. So, at like 2 am, I decided to just say eff it and order this one. And I'm honestly so glad I did. It's very similar to the one I had before with the steel frame and wood slats, which means I get great support, no sagging while holding up my HEAVY mattress, but also just a bit of flex so it doesn't feel like I'm sleeping on concrete. It's truly a wonderful nights sleep. The assembly was really straightforward (especially after disassembling my last one) and took maybe 5 minutes (but I tag teamed it with my boyfriend because tightening the bolts did take a minute). It also came with a little bold tightener thing that was such a NICE touch. The only thing that was not so great was that the frame was just a tad shorter than my mattress, so I ended up just placing it to where a bit of my mattress hangs off the end. It was also a bit small width-wise, so we had to kind of carefully place it in my actual bed frame.
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Reviewed in the United States on November 28, 2025 by LeeyaBeeya
Color: White
Size: Queen
Style: 4 Inch
Pattern Name: Box Spring Only
I can't say enough good things about this box spring. First, I had no idea that there *was* such a thing as non-standard box springs, and was pleasantly surprised to find so many options available. I went with this particular company because of the overwhelmingly positive reviews, and am happy to report those aren't just so much smoke being blown. From start to finish, this item was a) easy to put together, b) showcased quality construction, c) had great instructions, and d) included little touches that made me say "Why aren't more people doing this!?" Just as a couple of examples: they included a *ratcheting* hex wrench to make it easier to tighten a couple of the harder to reach screws (and it's a nice one that I plan to use whenever I get the chance). Also, the places where pieces need to match up (e.g. where the header and footer needed to attach to the side rails) had the same number on them. If the numbers match, you know everything is oriented the right way - brilliant! I've made a *LOT* of flat pack furniture in my day, and this was such a welcome "quality of life" move. I tested my bed out last night, and heard no creaking or squeaking (and I tend to toss and turn); if anything, my bed felt more solidly supported and comfortable with this box spring as a foundation. I would 100% purchase from this company again, and would recommend them highly to others.
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Reviewed in the United States on July 14, 2025 by Epic_Maus
Color: White
Size: Queen
Style: 7.5 Inch
Pattern Name: Box Spring Only
We transitioned from a box spring to this item. Our box springs was quite old and this item has been hands-down a huge improvement. I'm quite interested in whether the longevity over a decade or more exists but I would be willing to buy another one every 5-10 years if we had to because it is just such a solid product right now and works really well and was pretty fun to put together! Thanks to other reviewer's comments, I was anticipating the confusion on which way to put the cover on. Here's my attempt at clarifying the issue: The zipper surrounds the head AND foot and 1 "side" of the frame. It is understandable that people would assume the zipper should surround BOTH sides and either the head OR the foot but that just ain't so. Line it up properly along one side for success. The directions were super easy to follow; all the pieces' connections were numbered; all the screws were packaged nicely; the Velcro and staples to properly/evenly space the slats were an excellent idea; there was even a really handy tool included to install the screws quickly and easily! My #1 reason for replacing my box springs was to eliminate the constant squeaking sounds. Mission accomplished! Getting into bed or moving around no longer has a vast array of squeaking noises. It's funny the things you can get used to; I still keep expecting my bed frame to make its noises every time I sit down but it NEVER DOES now! There is a foam/rubber piece running down the entire length of the middle part of the frame adding additional sound dampening (I imagine). The sides and their Velcro attachments never wiggle nor make Velcro ripping sounds. This is working out great for supporting our considerably heavy memory foam mattress; I was a little bit concerned that the slats would be too far apart or the wood too weak for the heft and weight of the mattress + people but no problems so far. If it were easy to get the cover on and off, I would be doing so just to see how much movement getting in/out of bed and/or bouncing on it causes the wood slats to "give". But since the cover is on, I have no idea. Maybe in 2 years we'll break through one or more slats not realizing the stresses we were constantly placing upon them but I currently feel like that is unlikely. No creaking or other stress-related sounds so far! The cover looks nice if you aren't inclined to cover the cover. Hope you are able to enjoy it, too! * 2024-02-29 Update! No changes whatsoever. This product ROCKS!
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Reviewed in the United States on December 13, 2021 by p barker
Color: White
Size: Queen
Style: 7.5 Inch
Pattern Name: Box Spring Only
Looking for a box spring to on with a new mattress but didn't want to pay the crazy prices on suites like Purple. Most modern mattresses require the slats to be less than three inches or so and many metal box spring slats are too far apart unlike this Zinus model. The delivery box is pretty heavy and tall with everything being fitted together neatly in the box with no shipping damage even though it was unwieldy for the UPS driver to deliver it.Assembly is easy as everything is numbered and the side and middle rails fit together perfectly and I was able to put it together single handed. The holes aligned perfectly so screwing it together was easy especially as there was a basic ratcheting wrench included along with a conventional hexagonal wrench which I did not need to use. It is easier to fit the slats with two people and they attach to the Velcro strips on the rails with ease. The cover fits well and was we say to put on as it was neither too tight nor too loose and seems well made. The zip on the cover did not give by us any problem Altogether this is a very nice product with the proviso that it must fit your bed frame of course. One bed we have is too big for the box spring to fit by an inch or two so measure carefully!
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Reviewed in the United States on May 9, 2024 by The Doctor
Color: White
Size: King
Style: 7.5 Inch
Pattern Name: Box Spring Only
Ordered 2 of this Zinus box spring (queen and king size). Both were easy to assemble. Took me and my husband about 15 mins to put together each one. Instructions were very easy to follow with just a few steps and the wood slats were already put together with the Velcro already attached so all we had to do was put the screws on the well marked steel frame and stretch the wood slats all the way on each side then attach them to the other velcro on top of the steel frame. I could've assembled them myself but having another person to hold it up made zipping the cover so much easier. Box spring looks nice and sturdy and materials don't look cheap yet the price is reasonable. We had a small issue with the cover that came with the king size box spring since it won't zip up all the way. I think they inadvertently put the wrong size cover in the box so I called Amazon and the lady I spoke to was very nice and said that I can return the item. I told her that we already put it together and she said unfortunately they can't replace the box spring cover only. She arranged to have an entire box of the same product delivered within a week and as soon as we got the replacement, we simply removed the cover that was in the box and replaced it with the cover that was the wrong size. Overall, excellent product and great customer service with regards to the exchange.
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Reviewed in the United States on May 6, 2021 by Weekend Hiker