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Zinus

Zinus 4 Inch Box Spring with Cover, No Assembly Mattress Foundation, Sturdy Metal Structure, Split Cal King, White

  • Based on 7,304 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Jun 26
Order within 18 hours and 8 minutes
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Size: Split California King


Pattern Name: Box Spring


Features

  • Sturdy Steel Frame With Poly Jacquard Cover
  • 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

Description

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.

Brand: Zinus


Size: Split California King


Product Dimensions: 83"L x 71.5"W x 4"Th


Item Weight: 49.89 Pounds


Item Firmness Description: Medium


Top Style: Tight Top


Cover Material: Polyester


Number of Layers: 1


Fill Material: Memory Foam


Weight Limit: 700 Pounds


Item Firmness Description: Medium


Number of Layers: 1


Weight Capacity Maximum: 700 Pounds


Additional Features: Sturdy


Mattress Coil Type: Continuous Coil


Construction Type: Steel Frames


Number of Mattress Coils: 1


Is Customizable?: No


Mattress Base Compatibility: Box Spring


Is Electric: No


Portable: No


Is Foldable: Yes


Size: Split California King


Item Dimensions L x W x Thickness: 83"L x 71.5"W x 4"Th


Item Weight: 49.89 Pounds


Item Thickness: 4 Inches


Item Dimensions: 83 x 71.5 x 4 inches


Item Depth: 4 inches


Cover Material: Polyester


Fill Material: Memory Foam


Mattress Comfort Layer Material: Memory foam


Material Type: Fabric, Steel


Brand Name: Zinus


Model Name: No Assembly Metal Box Spring


Product Benefits: Easy setup, durable, and maneuverable box spring


Model Number: OLB-BIFD-4CK


UPC: 841550091786


Global Trade Identification Number: 86


Manufacturer: Zinus


Manufacturer Warranty Description: Worry-free 5 year limited warranty included.


Set Name: California King


Manufacturer Part Number: OLB-BIFD-4CK


Unit Count: 41.2118 Square Feet


Included Components: Box Spring


Age Range Description: Adult


Item Type Name: Box Spring


top-style: Tight Top


Color: White


Style Name: 4 Inch


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Jun 26

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.

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Similar Products

Top Amazon Reviews

    • Box springs matter - and this one is awesome!
Size: Split California King Pattern Name: Box Spring
I just spent my first evening sleeping on this box spring. I want to provide a review because I am so impressed. First, this is a good that is well packaged. A lot of thought seems to have gone into how to make the package the smallest possible size, simple to move, simple to use, and overall well protected. I imagine that if someone believes they will move often then this is the absolute perfect box spring. I would like to contrast this with my previous "luxury" box spring. I have a California King bed. I purchased it through Hilton's Employee Program and used the box springs for 10 years. The box springs were nice, but large and nearly impossible to move effectively. When I moved internationally and then back to the USA this was a huge hassle. This Zinus 4-inch box spring set (approximately 1/2 the size/height of my previous "luxury" box spring) would be so much simpler to move. I would also like to point out that due to it being only 4 inches, my bed looks "normal" again instead of being slightly over 4 feet tall and difficult to get in/out of. Okay, so when the box is open the Zinus box spring is simple to set up. As in, under 30 seconds/ea. This was awesome. I expected to be screwing things together. Quality: Seems great! I believe these materials will last. It seems to be higher quality materials than the previous mattress box springs I had. Sleep: I slept so well last night! Big change from the previous box spring. I honestly thought box springs were not that big of a deal - it's about the mattress, right? - but this made a difference. My wife and I could tell immediately. Flat bed, comfortable, slept well, easy set-up, easy to move in the future, and we're happy campers! I highly recommend this box spring. ... show more
Reviewed in the United States on December 20, 2016 by J. Taillon
    • Excellent product, works well, easy set up.
Size: Queen Pattern Name: Box Spring
Review Image by carol carol
Review Image by carol carol
Review Image by carol carol
Review Image by carol carol
Review Image by carol carol
Review Image by carol carol
I am a 56 year old woman and I was able to set this up all by myself. It was definitely a bit awkward and heavy-ish. It was not the easiest thing to do without a second person helping, but it is doable. The whole process (from box to finished with bedspread back on the bed) was about 20 minutes. There's nothing to it in terms of set up, other than the awkwardness of wrestling it out of the carton (it's kind of heavy), getting your mattress off the bed by yourself, wrestling the box spring onto the bed by yourself and then putting your mattress back on top by yourself. Once you get it out of the carton and you unfold it, the box spring "springs" to life. There is no assembly required other than unfolding it. It is for a guest bedroom so I haven't had any reports yet from guests sleeping on it. It looks sturdy and the perfect height for my platform bed. It has a much more inviting look now and will be easier for older guests to get in and out of the bed now. I didn't want a full height box spring because that would have been too high. This is perfect. I compared this against the least expensive Queen box spring I could have gotten delivered from a local mattress store and I saved over $100.00 overall (once you figure in $59 for white glove delivery, sales tax and the higher price for the box spring). I am very pleased with the purchase! The pictures I have attached show the process from box to finished bed. You can also compare how low my bed looked before versus how nicely elevated it is after adding the box spring. ... show more
Reviewed in the United States on February 15, 2017 by carol carol
    • Great box spring
Size: Split King Pattern Name: Box Spring
Review Image by Josie Josie
Added the perfect amount of height under our mattress and I love that it was so simple to install. Great product!
Reviewed in the United States on February 3, 2025 by Josie Josie
    • Great for a wood slat frame bed
Size: Full Pattern Name: Box Spring
I bought the Zinus metal box spring, along with a memory foam bed-in-a-box mattress, to replace a traditional mattress and box spring on an old wood-frame full size slat bed. The traditional set was much, much too heavy for the wood frame, and the side rails were starting to warp, the slats falling out frequently. The Zinus has actually stabilized the bed frame so I don't have those issues any more! It's quite rigid, acts more like a platform than a box spring, and works very well as a foundation for the memory foam mattress. The new combination is light enough that I can easily lift it to adjust the slats if they start to slip out of place. Assembly was easy, if a little awkward. I was doing this by myself, in a small room, so it took some maneuvering to get the Zinus out of its box, unfolded, flipped over, and set on the bed frame (when you unfold it out of the box, it ends up bottom up.) Really not difficult at all. I find the new configuration very comfortable; I've slept on it every night for about two months. The Zinus is quite rigid, as I said, but the memory foam mattress has enough "give" in it so I don't notice it. I haven't had any problems with the Zinus squeaking, and I checked after a month or so and didn't see any wires or metal pieces coming out of the cover or damaging my mattress. Absolutely perfect for what I needed. ... show more
Reviewed in the United States on December 19, 2021 by Tami Morse
    • Easy solid and light for good support
Size: Queen Pattern Name: Box Spring
Easy. Just unfold and zip. Solid buy light! Good support without adding a lot of height for my very thick mattress that weighs a lot.
Reviewed in the United States on January 1, 2025 by Suesieq
    • Nice box spring
Size: Queen Pattern Name: Box Spring
This was so easy to assemble. Just unfold it and put it on your bed frame. Very sturdy. I highly recommend!
Reviewed in the United States on November 30, 2024 by Ellen

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