---
product_id: 50745738
title: "7 Inch Metal Smart Box Spring / 350 lbs Mattress Foundation / Strong Metal Frame / Easy Assembly, Twin XL"
brand: "zinus"
price: "€ 458.50"
currency: EUR
in_stock: true
url: https://www.desertcart.nl/products/50745738-7-inch-metal-smart-box-spring-350-lbs-mattress-foundation
store_origin: NL
region: Netherlands
---

# Supports up to 350 lbs Compact all-in-one packaging 7-inch durable steel frame 7 Inch Metal Smart Box Spring / 350 lbs Mattress Foundation / Strong Metal Frame / Easy Assembly, Twin XL

**Brand:** zinus
**Price:** € 458.50
**Availability:** ✅ In Stock

## Summary

> 🛏️ Elevate your sleep game with steel-strong simplicity!

## Quick Answers

- **What is this?** 7 Inch Metal Smart Box Spring / 350 lbs Mattress Foundation / Strong Metal Frame / Easy Assembly, Twin XL by zinus
- **How much does it cost?** € 458.50 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/50745738-7-inch-metal-smart-box-spring-350-lbs-mattress-foundation)

## Best For

- zinus enthusiasts

## Why This Product

- Trusted zinus brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Assembly:** Comes with all tools and instructions in one compact box—set up your foundation in minutes, no hassle.
- • **Steel-Strong Support:** Engineered with a solid steel frame to hold up to 350 lbs, ensuring mattress longevity and stability.
- • **Tailored Twin XL Fit:** Designed specifically for Twin XL mattresses, providing a perfect, level base every time.
- • **Sleek & Subtle Design:** Finished in clean white alloy steel with a poly jacquard cover that complements any modern bedroom aesthetic.
- • **Peace of Mind Warranty:** Backed by Zinus’ 5-year limited warranty, guaranteeing durability and your investment’s protection.

## Overview

The ZINUS 7 Inch Metal Smart Box Spring for Twin XL mattresses combines a robust steel frame with easy assembly and a sleek design. Supporting up to 350 lbs, it offers a durable, level foundation that extends mattress life. Packaged compactly with all necessary tools and backed by a 5-year warranty, it’s the smart choice for millennials seeking reliable, stylish bedroom essentials.

## Description

We like to think of a box spring as the backbone for your mattress. The best kind should be flat, level and built to keep your mattress in tiptop shape; and that’s just what the Smart Box Spring does! With its easily assembled, dependable steel structure, you can rest assured that your mattress will be sitting pretty. An included poly jacquard cover blends with the rest of your bedroom, and with a variety of different thicknesses to choose from, you can pick the one you need to customize the height of the bed. 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.

## Features

- THE LAST BOX SPRING YOU’LL EVER NEED - Unlike a traditional box spring, the Smart box spring is made of solid steel that comes together in no time and is backed by our Zinus “Peace of Mind” 5 year warranty.Maximum weight recommendation:250 pounds
- DURABLY ENGINEERED - Durable steel is used to construct the inside framework of this foundation; twin size supports a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs
- THOUGHTFULLY PACKAGED - All parts, tools and instructions pack into one compact box that ships straight to your door
- Box spring only, a bed frame or platform bed is required to support this foundation and is sold separately
- Worry-free 5 year limited warranty included

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Size | Twin XL |
| Product Dimensions | 5"L x 5"W x 7"H |
| Special Feature | Durable |
| Color | White |
| Finish Type | Steel |
| Included Components | Bed Frame, Installation Manual, Tools |
| Compatible With Mattress Size | Twin XL |
| Brand | Zinus |
| Furniture Finish | Alloy Steel |
| Assembly Required | Yes |
| Manufacturer | Zinus |
| UPC | 841550100105 |
| Form Factor | Metal Bed Frame with 7-inch Height |
| Global Trade Identification Number | 00841550100105 |
| Assembly Instructions Description | Assembly instructions are included. |
| Headboard Material | Fabric |
| Item Weight | 26 pounds |
| Item model number | OLB-ABS-7TXL |
| Is Discontinued By Manufacturer | No |

## Product Details

- **Size:** Twin XL
- **Material:** Alloy Steel, Fabric
- **Product Dimensions:** 5"L x 5"W x 7"H
- **Style:** 7 inch
- **Special Feature:** Durable

## Images

![7 Inch Metal Smart Box Spring / 350 lbs Mattress Foundation / Strong Metal Frame / Easy Assembly, Twin XL - Image 1](https://m.media-amazon.com/images/I/61ir--3MHLL.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: 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 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.

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**Shop now:** [https://www.desertcart.nl/products/50745738-7-inch-metal-smart-box-spring-350-lbs-mattress-foundation](https://www.desertcart.nl/products/50745738-7-inch-metal-smart-box-spring-350-lbs-mattress-foundation)

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-03-19*