Mainstays 9 in Twin High Profile Easy Assembly Smart Metal Box Spring
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Mainstays

Mainstays 9 in Twin High Profile Easy Assembly Smart Metal Box Spring

4,231 ratings
Mainstays 9 in Twin High Profile Easy Assembly Smart Metal Box SpringMainstays 9 Twin High Profile Easy Assembly Smart Metal Box SpringMainstays 9 in Twin XL Smart Metal Box Spring High Profile Easy Assembly
Bed SizeTwin
Pack SizeSingle

Key item features

  • Twin Dimensions: This Twin box spring measures 74 inches long, 38 inches wide, and 9 inches high when assembled, with an assembled weight of 26.3 pounds.
  • Strong Capacity: This Twin variant supports a maximum load weight of 600 pounds, offering a robust foundation for your bedding setup.
  • Foldable Frame: Features a foldable steel frame, making it easy to store or transport when not in use, enhancing its practical utility.
  • Simple Assembly: Designed for quick and tool-free setup, allowing for straightforward assembly without the need for additional equipment.
  • Frame & Cover: It features a powder-coated steel frame and includes a jacquard cover, forming the complete foundation structure.
  • Mattress Compatibility: Offers a 9-inch high-profile foundation suitable for various mattress types, including innerspring, memory foam, or combination.
  • Components Sold: Mattresses and bed frames are sold separately, providing flexibility to pair this foundation with your preferred bedding setup.
Generated by AI

Specs

Bed size, TwinBox spring type, Mattress FoundationProfile, High ProfileMaterial, Steel, JacquardBrand, MainstaysMax load, 600 lb

About this item

Product details

This Mainstays Twin box spring gives you a 9-inch high-profile foundation built on a steel frame. The frame folds up, so you can move it or tuck it away when you need to store or transport it, and setup is designed to be completed without tools. Its steel construction is described as a base for innerspring, memory foam, or combination mattresses, giving you a straightforward foundation for a Twin-size bed. Mattresses and a bed frame are sold separately, so you can pair this foundation with the bedding setup that fits your room.
  • Twin assembled dimensions: 74 in L x 38 in W x 9 in H; assembled weight 26.3 lb
  • Maximum load weight: 600 lb for this Twin variant
  • Foldable steel frame for easier storage and transport
  • Tool-free setup
  • Powder-coated steel frame with a jacquard cover
  • Shipping dimensions: 41.3 in x 11.2 in x 10 in; shipping weight 30.5 lb
  • Mattresses and bed frame are sold separately
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.  

Specifications

Bed size

Twin

Box spring type

Mattress Foundation

Profile

High Profile

Material

Steel, Jacquard

Warranty

Warranty information

Limited Five (5) Year Warranty, Warranty available to original purchaser only. Proof of purchase is required. This warranty is your sole remedy for product defects only and does not cover damage due to mishandling, misuse, or abuse. The defects include circumstances where the frame is broken under normal use and no longer performs its function. The manufacturer is not responsible for incidental or consequential damages. This warranty gives you specific legal rights and you may also have other rights which vary from state to state. Our product is designed and manufactured to meet the highest quality standards. In the event that you have assembly questions, or parts are missing or damaged, please let us know before you decide to return your product to the store. Please contact customer service directly at: Email: CustomerService@gesin-cn.com Service Hours: Central Standard Time Monday - Friday: 9:00am - 4:00pm 1-800-681-0084 Thank you for purchasing our products. Inno-Sports Co., Ltd

Customer ratings & reviews

4.4 out of 5 stars
stars
4,231 ratings1,082 reviews
Includes global ratings and reviews
How item rating is calculated
  1. 5 stars74% (3,131)
  2. 4 stars10% (421)
  3. 3 stars5% (196)
  4. 2 stars3% (120)
  5. 1 star9% (363)

Reviews summary

Pros

  • : The foundation installs quickly without tools.
  • : The product offers sturdy build, easy assembly and low cost.
  • : The frame remains stable and does not shift after assembly.
  • : The cover fits well and presents a clean, mattress-like finish.
  • : The box spring enhances bed softness and maintains an even sleeping height.

Neutral

  • : Item fits many mattresses; covers or frames can be undersized.
Generated by AI
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
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Showing 1-3 of 1,082 reviews

Jan 12, 2026
Reviewer name: RW
5 out of 5 stars
5 out of 5 stars review

Seller Verified Purchase

Would recommend

Easy to assemble and fit perfectly in our king size frame.

International review
Review from walmart.ca
Helpful?55ea3b30-bb14-11f1-a662-695ec49556ce132963391
Nov 3, 2026
Reviewer name: WalmartCustomer
Item details
Bed size: Queen
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

We have a memory foam mattress and unfortunately there aren't any box springs you could use for it except walmart DID have one that could be used for my mattress so walmart came in with a solution to my problem!

Incentivized Review
Helpful?55ea3b30-bb14-11f1-a662-695ec49556ce132963391
Nov 4, 2026
Reviewer name: WalmartCustomer
Item details
Bed size: Twin
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

I purchased this product because it was on sale. I was glad to see it was available in the size I needed and at a good price. I've been avoiding buying one for a while because I couldn't afford it before.

Incentivized Review
Helpful?55ea3b30-bb14-11f1-a662-695ec49556ce132963391
Current price is $49.00
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