---
product_id: 438905096
title: "7 Inch King Metal Smart Box Spring with Quick Assembly, Mattress Foundation, Strong Metal Frame, Easy Assembly"
price: "$U143277"
currency: UYU
in_stock: true
reviews_count: 8
url: https://www.desertcart.uy/products/438905096-7-inch-king-metal-smart-box-spring-with-quick-assembly
store_origin: UY
region: Uruguay
---

# Compact, all-in-one packaging Strong steel frame supports up to 700 lbs Tool-free quick assembly 7 Inch King Metal Smart Box Spring with Quick Assembly, Mattress Foundation, Strong Metal Frame, Easy Assembly

**Price:** $U143277
**Availability:** ✅ In Stock

## Summary

> 🛏️ Build your bed’s backbone in minutes—strong, silent, and sleek.

## Quick Answers

- **What is this?** 7 Inch King Metal Smart Box Spring with Quick Assembly, Mattress Foundation, Strong Metal Frame, Easy Assembly
- **How much does it cost?** $U143277 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/438905096-7-inch-king-metal-smart-box-spring-with-quick-assembly)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Whisper-Quiet Stability:** Engineered to eliminate squeaks and shifts, so your sleep stays uninterrupted night after night.
- • **Rock-Solid Steel Support:** Durable alloy steel frame engineered to hold up to 700 lbs, ensuring mattress longevity and stability.
- • **Effortless Setup in Minutes:** Tool-free locking brackets mean no fumbling with bolts—get your foundation ready faster than ever.
- • **5-Year Peace of Mind Warranty:** Backed by a worry-free limited warranty, because durability should come with confidence.
- • **Compact & Convenient Packaging:** All parts and instructions arrive in one sleek box, making delivery and setup a breeze.

## Overview

The Zinus 7 Inch King Metal Smart Box Spring combines a durable alloy steel frame with innovative tool-free assembly, supporting up to 700 lbs for unmatched mattress stability. Delivered in a compact box with clear instructions, it offers a quiet, sturdy foundation backed by a 5-year limited warranty—perfect for millennials seeking hassle-free, long-lasting sleep solutions.

## Description

As the backbone for solid mattress support, a box spring that falls short can make or break your night’s sleep. We developed the Smart BoxSpring® with unbeatable durability and rock-solid stability to keep your mattress in shape for years to come. And our latest quick assembly version gives you total confidence when it comes to setup, requiring fewer bolts and ingeniously designed with easy to use, tool-free brackets. With our simple, step-by-step instructions on hand, you’ll have this foundation built and ready to use within minutes. Built with a strong and durable steel frame and a versatile poly jacquard cover that slips right on, the Smart BoxSpring® is the picture of dependability for any mattress. All packed in a compact shipping box with everything included, even our 5-year worry free warranty! Now that’s peace of mind you can sleep on.

Review: Very sturdy and surprisingly quiet - I’m honestly impressed with this foundation. I bought the king size and was expecting it to be heavy and complicated, but it was actually very easy to put together. The frame feels solid once it’s assembled, and it doesn’t wobble or shift when you get in and out of bed. What I like the most is that it makes absolutely no noise. No squeaks, no movement sounds at all. The support is firm in a good way, and the surface feels steady under the mattress. It also doesn’t weigh as much as I expected, so moving it around wasn’t a problem. Overall, it looks clean, feels durable, and holds the mattress perfectly without sliding. The height is perfect to match the regular bed headboard. (4 " works )Great buy.
Review: Strong and yet affordable - Had never heard of a box spring that is not made from wood. At first, I was skeptical to order a box spring from steel. My skepticism then got slightly worse when I read some negative reviews about "OHM, it takes too long to assemble!" Being an engineer and an optimist upon reading majority of great reviews, I went ahead and placed an order for queen box spring. Not only it arrived in time but it was also well-packed. It is heavy and you will need 2 people to carry the box from outside to your bedroom. Once I unopened the box, I was surprised to find the individual pieces tied up in groups based where they all go. Every single piece is numbered and lettered. A piece numbered "1" connects to another piece numbered "1", numbered "2" connects with another numbered "2". Very simple and easy. The kit also comes with tools. The part breakdown is as per below: A (inner long rail) = 2 B (inner short rail) = 1 C (outer short rail) = 2 D (outer long rail-1) = 2 E (outer long rail-2) = 2 F (Slats) = 10 S (shortest screws) = 8 M (mid-length screws) = 4 L (long screws) = 2 H (nuts) = 10 The best advice is that open the box, remove the cable ties, lay out all parts on floor as per the intended connection and get an idea of who connects to who (without actually assembling). It is otherwise called a "raw" or a "draft" assembly". Once it is done, it takes 30 minutes MAX to connect all components. I then put the cover on it and zipped it up. Voila, it was now ready to be placed on the bed. The moment of truth was moments away. My daughter and I lifted it up and placed it on her queen bed. It fit perfectly. We then put the mattress and lied down on it. It is very sturdy and does not squeak upon rolling. Overall, it is very strong and affordable. Here is the best part. It can be unassembled and moved to another place much easily (than the traditional wood box spring). I highly recommend it. Buy it with full confidence!

## Features

- STRONG, DEPENDABLE, AND READY IN NO TIME - As if its ultra-durable steel structure and convenient packaging weren’t impressive enough, our original Smart BoxSpring has been given a quick-assembly upgrade
- DURABLY ENGINEERED - Durable steel is used to construct the inside framework of this foundation; twin/twin xl sizes support a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs
- EASIER THAN EVER ASSEMBLY - With fewer bolts and tool-free locking brackets for intuitive setup, assembly takes only minutes to complete
- 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Color | Grey |
| Material | Alloy Steel , Fabric |
| Product Dimensions | 78.7"L x 75.5"W x 7"H |
| Size | King |
| Special Feature | Durable |
| Style | 7 inch |

## Product Details

- **Size:** King
- **Material:** Alloy Steel, Fabric
- **Product Dimensions:** 78.7"L x 75.5"W x 7"H
- **Style:** 7 inch
- **Special Feature:** Durable

## Images

![7 Inch King Metal Smart Box Spring with Quick Assembly, Mattress Foundation, Strong Metal Frame, Easy Assembly - Image 1](https://m.media-amazon.com/images/I/61e4dd+fl8L.jpg)

## Available Options

This product comes in different **Pattern, Size, Style** options.

## Questions & Answers

**Q: Are any tools required to assemble my box spring?**
A: Yes, just a few! But this box spring is shipped with everything you need to assemble it - all parts, tools and instructions can be found efficiently packed in the shipping box.

**Q: Does this box spring require a bed frame?**
A: A basic metal bed frame or platform bed (sold separately) is required to support this box spring. Add your mattress, and you’ve got the dynamic trio for rock solid support.

**Q: What kind of mattress can this box spring support?**
A: Our box springs are designed to do it all. Rest your memory foam, latex or spring mattress on top for smooth snoozing.

**Q: What is the distance between slats?**
A: For Twin and Full sizes, spacing is 6.3 inches. For Twin XL, Queen and King sizes, spacing is 6.7 inches. For California King size, spacing is 7.2 inches.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very sturdy and surprisingly quiet
*by A***3 on November 19, 2025*

I’m honestly impressed with this foundation. I bought the king size and was expecting it to be heavy and complicated, but it was actually very easy to put together. The frame feels solid once it’s assembled, and it doesn’t wobble or shift when you get in and out of bed. What I like the most is that it makes absolutely no noise. No squeaks, no movement sounds at all. The support is firm in a good way, and the surface feels steady under the mattress. It also doesn’t weigh as much as I expected, so moving it around wasn’t a problem. Overall, it looks clean, feels durable, and holds the mattress perfectly without sliding. The height is perfect to match the regular bed headboard. (4 " works )Great buy.

### ⭐⭐⭐⭐⭐ Strong and yet affordable
*by V***Y on February 24, 2020*

Had never heard of a box spring that is not made from wood. At first, I was skeptical to order a box spring from steel. My skepticism then got slightly worse when I read some negative reviews about "OHM, it takes too long to assemble!" Being an engineer and an optimist upon reading majority of great reviews, I went ahead and placed an order for queen box spring. Not only it arrived in time but it was also well-packed. It is heavy and you will need 2 people to carry the box from outside to your bedroom. Once I unopened the box, I was surprised to find the individual pieces tied up in groups based where they all go. Every single piece is numbered and lettered. A piece numbered "1" connects to another piece numbered "1", numbered "2" connects with another numbered "2". Very simple and easy. The kit also comes with tools. The part breakdown is as per below: A (inner long rail) = 2 B (inner short rail) = 1 C (outer short rail) = 2 D (outer long rail-1) = 2 E (outer long rail-2) = 2 F (Slats) = 10 S (shortest screws) = 8 M (mid-length screws) = 4 L (long screws) = 2 H (nuts) = 10 The best advice is that open the box, remove the cable ties, lay out all parts on floor as per the intended connection and get an idea of who connects to who (without actually assembling). It is otherwise called a "raw" or a "draft" assembly". Once it is done, it takes 30 minutes MAX to connect all components. I then put the cover on it and zipped it up. Voila, it was now ready to be placed on the bed. The moment of truth was moments away. My daughter and I lifted it up and placed it on her queen bed. It fit perfectly. We then put the mattress and lied down on it. It is very sturdy and does not squeak upon rolling. Overall, it is very strong and affordable. Here is the best part. It can be unassembled and moved to another place much easily (than the traditional wood box spring). I highly recommend it. Buy it with full confidence!

### ⭐⭐⭐⭐⭐ Effortless Assembly and Rock-Solid Support – A Huge Improvement Over Older Models
*by M***I on July 20, 2025*

I’m really impressed with how far assemble-at-home box springs have come. I bought this California King size box spring and couldn’t be happier with the experience. Setup was incredibly easy—everything fit together perfectly, and I had it fully assembled in under 30 minutes without any frustration. It feels solid and well-built, offering great support for the mattress. The last time I assembled a box spring at home was back in 2018, and that one was a struggle from start to finish. This one was the complete opposite—quick, intuitive, and sturdy. Highly recommend if you're looking for a hassle-free option that doesn't compromise on quality.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.uy/products/438905096-7-inch-king-metal-smart-box-spring-with-quick-assembly](https://www.desertcart.uy/products/438905096-7-inch-king-metal-smart-box-spring-with-quick-assembly)

---

*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-04*