Search  for anything...
Zinus

ZINUS 9 Inch No Assembly Metal Box Spring, Cool Mattress Foundation, Sturdy Metal Structure, Split King, White

  • Based on 3,692 reviews
Condition: New
Checking for the best price...
$228.99 Why this price?
Save $71.00 was $299.99

Buy Now, Pay Later

As low as $38.17 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund / replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon
Arrives Saturday, Jun 6
Order within 22 hours and 42 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Size: King


Features

  • Sturdy Steel Frame With Poly Jacquard Cover
  • Folding mattress foundation compresses for easy mobility and storage
  • Designed to have the look of a traditional box spring
  • No assembly required, simply open the box, slide the foundation out and unfold, it will immediately open to the shape of a box spring
  • Steel frame with fabric cover

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: King


Product Dimensions: 79"L x 75.5"W x 9"Th


Item Weight: 63 Pounds


Cover Material: Poly Jacquard


Fill Material: Steel


Weight Limit: 700 Pounds


Special Feature: Durable


Color: White


Model Name: 9 Inch No Assembly Metal Box Spring


Weight Capacity Maximum: 700 Pounds


Additional Features: Durable


Construction Type: Steel


Mattress Base Compatibility: Box Spring


Size: King


Item Dimensions L x W x Thickness: 79"L x 75.5"W x 9"Th


Item Weight: 63 Pounds


Item Dimensions: 79 x 75.5 x 9 inches


Item Depth: 9 inches


Cover Material: Poly Jacquard


Fill Material: Steel


Product Care Instructions: Spot Clean Only


Material Type: Poly jacquard, Steel


Color: White


Shape: Rectangular


Style Name: 9 Inch


Brand Name: Zinus


Model Name: 9 Inch No Assembly Metal Box Spring


Product Benefits: Durable, Comfortable


Model Number: SM-SC-BIFD-9SK


UPC: 841550051520


Global Trade Identification Number: 20


Manufacturer: Sleep Revolution


Manufacturer Warranty Description: 5-year warranty.


Set Name: King


Manufacturer Part Number: SM-SC-BIFD-9SK


Unit Count: 1.0 Count


Included Components: Box Spring, Bed Frame, Instruction Manual


Item Type Name: Cool Mattress Foundation, Sturdy Metal Structure


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jun 6

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great value for your money
Size: Split Queen
This brand of box spring is my go-to! I recently had to purchase a thicker box spring for my new bed frame and knew this brand was reliable so I purchased from them for a second time. Zero regrets! So easy to set up- un-box, unfold and voila! Done! Super durable, great quality, the height was perfect for my needs. I previously had the 4" and upgraded to this one. Great value for the money both times around. Just FYI I had the old one for almost 10 years and 3 moves and it is in perfect condition. ... show more
Reviewed in the United States on February 23, 2026 by TheSaint
    • Great foundation for your mattress!
Size: Split Cal King
Really well made. Easy to assemble. Made my memory foam mattress much more comfortable. Upgraded from a 20 plus year old box spring. Awesome!
Reviewed in the United States on April 12, 2026 by George
    • No assembly required
Size: Split Queen
Esay to unfold. No assembly required. Fits great. Exceeded my expectations.
Reviewed in the United States on May 14, 2026 by Amazon Customer
    • Fast and easy Fast and easy
Size: Split Queen
Review Image by JEDI
Fast delivery, easy set up. Fit great. Looks good. Seems sturdy.
Reviewed in the United States on January 11, 2026 Reviewed in the United States on January 11, 2026 by JEDI
    • Perfect Mattress Foundations!!
Size: Split Queen
This is the perfect mattress foundation. Easy to move into or around your house, especially for downstairs bedrooms, or upstairs for that matter ... if you need to navigate a stairway, these are the mattress foundations for you!! Come folded with the cover already installed, but unzipped. Having the cover unzipped allows you to unfold the metal frame without having to remove the covers. Simply carry over to the bed frame, unfold, zip the cover and put into place ... BOOOM! your ready for the mattress!! Could absolutely not be more convenient and easy to assemble and use. Lastly, provides firm support for your mattress and provides that extra hight to the mattress that makes it more comfortable to sit on the bedside, giving you a better hight for making the bed, etc. I use them in two bedrooms and love them. Very highly recommended. ... show more
Reviewed in the United States on February 24, 2024 by Ed B.
    • Easy assembly
Size: Full
I like the size
Reviewed in the United States on December 10, 2024 by Eva
    • Very satisfied!!!
Size: Split Queen
I was very skeptical at first but still took a risk and ordered the product. No other spring boxes would fit to go through a narrow door entrance and this one fit perfectly! It was folded in half and quality is very good. Very much satisfied! It was a genius invention!!!
Reviewed in the United States on April 27, 2026 by Karolina Kordik
    • Does NOT ship via Prime - Full Size is VERY durable!
Size: Full
I needed to get a full size box spring shipped to my daughter at school. She was moving into a new apartment for summer classes and the clock was working against us. PLEASE NOTE: Despite this being sold and shipped by Amazon and it saying on the page that it is "eligible for Prime after processing", it is NOT. It will NOT ship via Prime. It is drop shipped from California. You can do the math on how many days it takes to arrive. Typically, it takes 5 business days to go across country, plus an additional 1-2 days of processing time. If you have time constraints, this is not for you. Despite the delay in arrival, we were quite pleased with the box spring. It was easy enough for my college age daughter to transport from the package pick up point (she has a Jetta!) and set up by herself in her 2nd floor apartment. It gets 5 stars for simplicity alone. Sturdy and durable so far. There is no sagging and it supports a high quality 14" full size mattress with ease. Price point is fair considering it is easy to transport, shipped to your door and durable. UPDATE: Over a year later and yes, we are still very pleased. This box spring has survived college life and has traveled home for the summer. My daughter actually requested it be swapped out for the one we have here at home for her so she could enjoy it while at home this summer. ... show more
Reviewed in the United States on May 12, 2015 by Olivia

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...