---
product_id: 653793408
title: "9 Inch WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, King, Grey"
brand: "zinus"
price: "€ 365.50"
currency: EUR
in_stock: true
url: https://www.desertcart.ie/products/653793408-9-inch-wonderbox-tm-smart-box-spring-quick-assembly-mattress
store_origin: IE
region: Ireland
---

# Tool-free quick assembly 9-inch customizable height Durable steel frame 9 Inch WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, King, Grey

**Brand:** zinus
**Price:** € 365.50
**Availability:** ✅ In Stock

## Summary

> 🛏️ Elevate your sleep game with effortless style and rock-solid support!

## Quick Answers

- **What is this?** 9 Inch WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, King, Grey by zinus
- **How much does it cost?** € 365.50 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/653793408-9-inch-wonderbox-tm-smart-box-spring-quick-assembly-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

- • **Eco-Smart Packaging:** Compact WonderBox delivery reduces waste and fits through any doorway with ease.
- • **Sleep with Confidence:** Backed by a 5-year warranty, because your rest deserves peace of mind.
- • **Tailored Comfort Boost:** Choose between 5 or 9 inches to elevate your sleep sanctuary exactly how you like it.
- • **Snap & Sleep in Minutes:** Tool-free design means zero frustration and setup in under 10 minutes.
- • **Built to Last, Built for You:** Heavy-duty steel frame ensures your mattress stays supported and comfy for years.

## Overview

The Zinus 9 Inch WonderBox Smart Box Spring is a king-size mattress foundation featuring a durable steel frame and a tool-free, quick assembly design. It offers customizable height options (5 or 9 inches) to optimize comfort and mattress longevity. Delivered in eco-friendly compact packaging, it supports easy maneuvering and includes a 5-year warranty for worry-free durability.

## Description

Zinus 9 Inch WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, King, Grey

## Features

- EASY DELIVERY & A CLEANER PLANET – Delivered in our earth-friendly WonderBox that is surprisingly small and easy to maneuver through doorways and tight corners
- EFFORTLESS ASSEMBLY: Tool-free design snaps together in minutes for a frustration-free setup
- CUSTOMIZABLE COMFORT: Choose from two heights to create your perfect sleep oasis – 5 inches for a lower profile, or 9 inches for an extra boost
- DURABLE STEEL CONSTRUCTION: Provides long-lasting support for your mattress, maximizing comfort and lifespan
- WORRY-FREE WARRANTY – Sleep soundly with an included 5-year warranty. Box spring only, a bed frame or platform bed is required to support this foundation and is sold separately

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Size | King |
| Product Dimensions | 78.7"L x 75.5"W x 9"H |
| Special Feature | Easy assembly, Squeak Resistant |
| Color | Grey |
| Finish Type | Unfinished |
| Included Components | Box Spring, Instruction Sheet |
| Compatible With Mattress Size | King |
| Brand | Zinus |
| Furniture Finish | Gray |
| Assembly Required | Yes |
| Manufacturer | Zinus |
| UPC | 841550372724 |
| Form Factor | Rectangular bed frame |
| Global Trade Identification Number | 00841550372724 |
| Assembly Instructions Description | Included |
| Item Weight | 36.7 pounds |
| Item model number | ZU-FBSSG1OC-09K |

## Product Details

- **Size:** King
- **Material:** Alloy Steel
- **Product Dimensions:** 78.7"L x 75.5"W x 9"H
- **Style:** 9 inch
- **Special Feature:** Easy assembly, Squeak Resistant

## Images

![9 Inch WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, King, Grey - Image 1](https://m.media-amazon.com/images/I/71r54UF-PIL.jpg)

## Available Options

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

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**Shop now:** [https://www.desertcart.ie/products/653793408-9-inch-wonderbox-tm-smart-box-spring-quick-assembly-mattress](https://www.desertcart.ie/products/653793408-9-inch-wonderbox-tm-smart-box-spring-quick-assembly-mattress)

---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-03*