---
product_id: 347564066
title: "ZINUS 9 Inch Metal Smart Box Spring / 350 lbs Mattress Foundation/Strong Metal Frame/Easy Assembly, Twin"
brand: "zinus"
price: "€ 601.22"
currency: EUR
in_stock: true
reviews_count: 5
category: "Zinus"
url: https://www.desertcart.hr/products/347564066-zinus-9-inch-metal-smart-box-spring-350-lbs-mattress
store_origin: HR
region: Croatia
---

# 74x38x9 in Twin size Easy ratchet assembly 350 lbs weight capacity ZINUS 9 Inch Metal Smart Box Spring / 350 lbs Mattress Foundation/Strong Metal Frame/Easy Assembly, Twin

**Brand:** zinus
**Price:** € 601.22
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** ZINUS 9 Inch Metal Smart Box Spring / 350 lbs Mattress Foundation/Strong Metal Frame/Easy Assembly, Twin by zinus
- **How much does it cost?** € 601.22 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/347564066-zinus-9-inch-metal-smart-box-spring-350-lbs-mattress)

## 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 Setup:** Includes a ratchet Allen key for quick, no-fuss assembly—get your bed foundation ready in minutes, no handyman needed.
- • **Silent Support System:** Foam-padded connections eliminate squeaks, delivering a peaceful, undisturbed night every time.
- • **Peace of Mind Warranty:** Backed by a 5-year limited warranty, this foundation is the last box spring you'll ever need.
- • **Built to Last Steel Frame:** Solid alloy steel construction ensures unmatched durability and stability for years of restful sleep.
- • **Optimized Twin Dimensions:** Compact 74 x 38 x 9 inches fits perfectly in tight spaces without compromising support or style.

## Overview

The ZINUS 9 Inch Metal Smart Box Spring is a twin-sized mattress foundation crafted from durable alloy steel, supporting up to 350 lbs. Designed for easy assembly with included tools and foam-padded joints to prevent noise, it offers a sleek, space-saving solution compatible with all Zinus mattresses. Backed by a 5-year warranty, it combines lasting strength with modern convenience for the savvy millennial professional.

## 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.

Review: Sturdy, Quiet, Functional ! Great Value overall. - I bought this because a traditional box spring would not have fit up the staircase in my home due to a hair pin turn. I thought that I would be sacrificing structural integrity by buying this, but I was wrong. This thing has been very sturdy. I actually fell on this full force on the ground and it did not budge ( I'm over 300 lbs for reference.).. Another issue I thought I would encounter was squeaking. To my surprise they have added foam to the connections to prevent this and it has worked for almost a year so far. Also I thought with all the Allen key components it would be difficult to assemble, but the ratchet Allen key that they include makes it very easy to assemble. The has also proved versatile for other projects If you don't have the space to bring in a full queen box spring for whatever reason, rest assured that this is a good solution for you.
Review: Es un buen producto, lo recomiendo - Lo pedí hace unos meses y me pareció un buen producto, sólo que me equivoqué ya que mi cama quedó muy alta. Lo debe haber pedido de menos centímetros. Lo ensamble yo sola y me fue bien

## Features

- TWIN DIMENSIONS - The dimensions of this standard twin size box spring are 74 x 38 x 9 inches. The length is 5 inches shorter than our Twin XL size. Please measure your bed frame to ensure compatibility
- THE LAST BOX SPRING YOU’LL EVER NEED - Crafted from solid steel for lasting strength, and compactly packaged in a single box with all parts and instructions included
- 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 Full, Queen & King sizes can support up to 700 lbs
- VERSATILE FIT - Compatible with all Zinus mattresses and bed frames; please confirm dimensions before using with non-Zinus products
- WARRANTY INCLUDED - Included a 5-year limited warranty for the box spring only; a bed frame is required to support this foundation and is sold separately

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00NPVCNS8 |
| Best Sellers Rank | #255,005 in Home ( See Top 100 in Home ) #733 in Bed Frames |
| Brand Name | Zinus |
| Color | Black |
| Colour | Black |
| Compatible With Mattress Size | Twin |
| Customer Reviews | 4.5 out of 5 stars 74,888 Reviews |
| Form Factor | Spring Box |
| Furniture Finish | Colour: white |
| Global Trade Identification Number | 00841550068610 |
| Included Components | Foundation, Cover |
| Included components | Foundation, Cover |
| Item Dimensions | 188 x 96.5 x 22.9 centimeters |
| Item Type Name | Box Spring |
| Item Weight | 26.23 Pounds |
| Manufacturer | Zinus - DROPSHIP |
| Manufacturer Part Number | OLB-ABS-9T |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Maximum Weight Recommendation | 158.76 kg |
| Model Number | OLB-ABS-9T |
| Other Special Features of the Product | Easy Assembly, Space-Saving |
| Product Care Instructions | Wipe with Damp Cloth |
| Required Assembly | Yes |
| Shape | Rectangular |
| Size | Twin |
| Special features | Easy Assembly, Space-Saving |
| Style | Box Spring (Original) |
| Style Name | Box Spring (Original) |
| Target Audience | unisex-adult |
| UPC | 841550068610 |
| Unit Count | 1 Count |

## Product Details

- **Colour:** Black
- **Included components:** Foundation, Cover
- **Material:** Alloy Steel
- **Size:** Twin
- **Style:** Box Spring (Original)

## Images

![ZINUS 9 Inch Metal Smart Box Spring / 350 lbs Mattress Foundation/Strong Metal Frame/Easy Assembly, Twin - Image 1](https://m.media-amazon.com/images/I/71CEZa6IyJL.jpg)
![ZINUS 9 Inch Metal Smart Box Spring / 350 lbs Mattress Foundation/Strong Metal Frame/Easy Assembly, Twin - Image 2](https://m.media-amazon.com/images/I/61mmmqjYYbL.jpg)
![ZINUS 9 Inch Metal Smart Box Spring / 350 lbs Mattress Foundation/Strong Metal Frame/Easy Assembly, Twin - Image 3](https://m.media-amazon.com/images/I/61epyXuOcBL.jpg)
![ZINUS 9 Inch Metal Smart Box Spring / 350 lbs Mattress Foundation/Strong Metal Frame/Easy Assembly, Twin - Image 4](https://m.media-amazon.com/images/I/81jdaFW2hiL.jpg)
![ZINUS 9 Inch Metal Smart Box Spring / 350 lbs Mattress Foundation/Strong Metal Frame/Easy Assembly, Twin - Image 5](https://m.media-amazon.com/images/I/71OLk53wAmL.jpg)

## 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Sturdy, Quiet, Functional ! Great Value overall.
*by K***E on 14 July 2021*

I bought this because a traditional box spring would not have fit up the staircase in my home due to a hair pin turn. I thought that I would be sacrificing structural integrity by buying this, but I was wrong. This thing has been very sturdy. I actually fell on this full force on the ground and it did not budge ( I'm over 300 lbs for reference.).. Another issue I thought I would encounter was squeaking. To my surprise they have added foam to the connections to prevent this and it has worked for almost a year so far. Also I thought with all the Allen key components it would be difficult to assemble, but the ratchet Allen key that they include makes it very easy to assemble. The has also proved versatile for other projects If you don't have the space to bring in a full queen box spring for whatever reason, rest assured that this is a good solution for you.

### ⭐⭐⭐⭐⭐ Es un buen producto, lo recomiendo
*by N***Í on 8 June 2026*

Lo pedí hace unos meses y me pareció un buen producto, sólo que me equivoqué ya que mi cama quedó muy alta. Lo debe haber pedido de menos centímetros. Lo ensamble yo sola y me fue bien

### ⭐⭐⭐⭐⭐ Best Box Spring Ever!
*by B***D on 29 April 2015*

This product is great, I am 100% satisfied with this purchase. I am using this box spring with a Nature Sleep memory foam mattress. If you have an innerspring mattress your mileage may vary. My review as follows will cover several different aspects of this product and why they are great. Portability: Who knew you could assemble a box spring instead of lugging around a 50+ pound bulky wooden frame? Once assembled, the frame is lightweight and much easier to move around than a traditional box spring. The next time I move I am just going to take it apart instead of it taking up space in the moving truck, very economical in that sense. Assembly: Assembly was very easy, no mechanical inclinations required from the assembler. The set comes with an allen wrench/hex key and you use that to hold bolts in place while you tighten wingnuts with your fingers. Please ignore any reviewer of this product who said it was too difficult to assemble, took too long, or had confusing instructions, they are either lazy or completely incompetent. It took me about an hour to assemble by myself, and it would have taken even less time if I hadn't been half watching TV and drinking a beer while I was putting it together. The instructions aren't written words, but pictures showing which pieces to assemble with which bolts, but if you ever built a Lego set when you were a kid you should be able to handle this. It is easy to tell which pieces should be facing up during assembly, because most have a 'this side up' sticker. The pieces that don't, it either doesn't matter which side is up or you can tell which side should be up because of the notches the slats will fit into at the end. The Cover/ Looks: The zip cover looks nice and the white sides are a soft plush. Make sure you sweep your floor before zipping the cover on though or you might get dirt all over the nice white part. Some people said that the cover ripped when they were zipping it up, that was not the case for me. The cover is a very tight and perfect fit, but the white sides stretch. So when you zip it on, don't just yank on the zipper as hard as you can, pull up on the white parts that stretch and it will make the zipper easier to close. Durability: It seems sturdy enough to me. I have had for two weeks, no complaints. I have unzipped and re-examined the frame and it has not bent or buckled under the weight of two people or any vigorous activity. Could you bend the metal of the frame after you put it together? I guess you could if you tried to, but why would you do that deliberately? Putting a mattress on top of it and using as intended should leave you with no issues. I hope this review provided all the information needed to help in your purchase decision, and I am sure you will be satisfied with this box spring.

## Frequently Bought Together

- ZINUS 9 Inch Metal Smart Box Spring, Mattress Foundation, Strong Metal Frame, Easy Assembly, Twin
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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-07-28*