ZINUS No Assembly Metal Box Spring / 4 Inch White Mattress Foundation / Sturdy Metal Structure, Split King

(10 customer reviews)


Product details

Size Split King
Brand Zinus
Product Dimensions 79″L x 75.5″W x 4″Th
Color White
Age Range (Description) Adult
Model Name No Assembly Metal Box Spring
  • Sturdy Steel Frame With Poly Jacquard Cover
  • General Note: Please allow 24 – 72 hours for your Mattress to regain its full shape. Any memory foam will expand faster in a warmer room. In cold temperature, at delivery, your mattress may take a bit longer to return to full sized from its compressed state.The expansion time of the mattress will vary as per the surrounding.
  • AS SIMPLE AS UNFOLD & UNWIND – Requiring no tools and zero tedious assembly, the innovative No Assembly box spring requires only unfolding to become bedtime ready; the hardest part will be taking it out of the box.DURABLY ENGINEERED – Durable steel is used to construct the interior framework of this reliable foundation; twin size supports a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs; King and Cal King sizes are split versions
  • 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 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


Believe it or not, we’ve made the box spring more functional, more durable, and dare we even say, fun! Our No Assembly Box Spring is not your average foundation. Its folding design not only makes set-up insanely easy, but it also comes in handy on moving day, maneuvering easily in and around tight hallways and corners. What’s more, it features a structure made of thick and durable steel, meaning that frames and mattresses may come and go, but this box spring will be with you for the long haul. Once unboxed, this brilliant foundation practically assembles itself by taking shape once unfolded. Essentially, deciding where to place the bed will take longer than setting up this box spring. Backed by both our 5-year worry free warranty and hundreds of positive customer reviews, this box spring is about as easy as decisions get.

From the manufacturer

Zinus logo banner

boxspring with frame
Designed for Convenience

Unfold & Unwind

A bifold box spring offers the look and functionality of a typical box spring without its tedious assembly. It is expertly engineered from heavy gauge steel to improve durability and still fit into a single box for easy mobility around tight spaces.

available in 4, 7.5 and 9 inches profiles

Snaps into place like your wallet

boxspring steel frame

Strong, Stable and Sturdy

Built to Last

Interior steel framework adds premium strength, structure and longevity and requires no extra assembly.

quick assembly icon

Handyman Skills Not Required

Ready in No Time

If you can open a book, you can put together this one-and-done foundation in just a few minutes. A folding design makes set-up a snap and comes in handy when moving around tight corners and stairways.

Are any tools required to assemble my box spring?

No tools are required to assemble the BiFold box spring; that’s the beauty of it! Set-up is as simple as unbox, unfold and unwind.

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.

How much weight can this box spring support?

Excluding the weight of the mattress, Twin and Twin XL sizes can support a maximum weight of 250 lbs. Full, Queen, King and California King sizes can support up to 500 lbs.

Additional information

Weight 50.8 lbs
Dimensions 79 × 75.5 × 4 in
Product Dimensions

79 x 75.5 x 4 inches

Item Weight

50.8 pounds



Country of Origin


Item model number


Item Thickness

4 Inches

Fabric Type

Sturdy Steel Frame With Poly Jacquard Cover

Form Factor

Bed Frame

Assembly Required


Warranty Description

Worry-free 5 year limited warranty included.

Batteries Required


Included Components

Box Spring



10 reviews for ZINUS No Assembly Metal Box Spring / 4 Inch White Mattress Foundation / Sturdy Metal Structure, Split King

  1. Amazon Customer

    Does a jobShipped fast, walked the thing half a block and set it up all by myself. Doesn’t look like trash and hasn’t given me any trouble. If you just need something to stop your mattress from falling through a bedframe, you could do a lot worse.

  2. Frances Marchesi

    Perfect height for mobility issuesVery easy to put together, just open and it becomes a queen size box spring. Very sturdy, no noise or squeaks. Easy to get out of bed if someone has mobility issues. For one, I hate these high beds that you need a step stool to reach the bed.

  3. Elizabeth Wagner

    5 MinutesThis. This box spring is everything. Once I had taken my old box spring off, it took me about fiveminutes to open the box, remove bubble wrap, open and place this low profile box spring on my bed frame. I had no help, just me with my kid watching me, silently judging me for deciding to do the box spring switch during the middle of the day during a heatwave in a bedroom that doesn’t have AC. She was grilling me hard, or maybe I was projecting. Who knows?! Now, I carry a toddler around and am use to lifting heaven things with relative ease and found the frame much easier to navigate and lift than my queen foam mattress.The slats to the frame run vertically rather than horizontally which, is incredibly smart and, I believe, will create more support that lasts longer than the horizontal counterparts. The metal is sturdy and I noticed I’m not sinking as much as I did with my former wooden box spring that has larger spaces between slats.You don’t need to be superwoman set this up or a graphic design major from Sweden to decipher the directions. If you’re contemplating whether to get this boxspring, let this review be your sign to go ahead and treat yourself to some quality, easy to put together boxspring. You’re worth it.

  4. Jackie K.

    Fit like a glove and easy to installMy wife and I are setting her brother up in a “old folks home” Don’t tell them I said that. The place is nice, clean with a view of the street. My wife and I are in our mid seventies…her brother is mid sixties. We ordered this box spring to lift his mattress up just a little. To clear the bed frame and bring the height up just a little. We took it out of the box before we transported it to give more room to grip and move it. We got to his place and slid it out onto the hand truck into the elevator to the third floor. He had moved the mattress upright to the side of the bed. We put the box spring on and put the mattress on top. Done. Easy Greasy. I couldn’t believe how nice it looked and how comfortable the finished product was. It’s just what we need for three old coots to DIY. Why we can’t make these over here in our country is a mystery to me. The Chinese did a good job on this one.

  5. Kim R.

    Great Purchase!I am very pleased with this mattress foundation. It’s heavy duty, super easy to set up, and fits my bed frame perfectly. I needed a low profile foundation because of a very thick mattress. Got the 4″ foundation and am so glad I did! Cover may not last forever, but that’s not a deal breaker for me. It fits, it’s easy. Great purchase.

  6. Deb Assouline

    PerfectWe had a 10 inch box spring- now I no longer have to run and jump into the bed

  7. Kira Lumpkin

    Love itEasy and durable been using this for over a year and still good like new!

  8. Doris Chicas De Carranza

    Me gustoMuy fácil y bonito

  9. Janie1014

    Great product!Easiest install ever for a box spring. Would recommend and purchase agin if needed.

  10. Alba Martinez

    Easy to assembleThis product is very easy to assemble, I was looking for something affordable and sturdy and this was perfect for the $$. I highly recommended

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