--- product_id: 641697243 title: "Zinus 5 Inch King WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Grey" brand: "zinus" price: "€ 454.46" currency: EUR in_stock: true category: "Zinus" url: https://www.desertcart.be/products/641697243-zinus-5-inch-king-wonderbox-tm-smart-box-spring-quick store_origin: BE region: Belgium --- # Compact eco-friendly packaging Tool-free quick assembly Durable steel frame support Zinus 5 Inch King WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Grey **Brand:** zinus **Price:** € 454.46 **Availability:** ✅ In Stock ## Summary > 🛠️ Assemble fast, sleep better — the smart foundation your mattress deserves! ## Quick Answers - **What is this?** Zinus 5 Inch King WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Grey by zinus - **How much does it cost?** € 454.46 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/641697243-zinus-5-inch-king-wonderbox-tm-smart-box-spring-quick) ## 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 - • **Built to Last:** Heavy-duty steel frame ensures long-term mattress support - • **Sleep Worry-Free:** Backed by a 5-year warranty for ultimate peace of mind - • **Eco-Smart Packaging:** Compact WonderBox reduces carbon footprint and eases delivery - • **Custom Comfort Heights:** Choose 5 or 9 inches to tailor your perfect sleep profile - • **Snap & Sleep in Minutes:** Effortless, tool-free setup saves time and frustration ## Overview The Zinus 5 Inch King WonderBox™ Smart Box Spring combines durable steel construction with a tool-free, quick assembly design. Delivered in a compact, eco-friendly box, it offers customizable height options and a 5-year warranty, making it the perfect foundation to enhance mattress longevity and comfort for king-size beds. ## 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. ## 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 | |---------------|-------| | ASIN | B0D2VP2JDK | | Assembly Instructions Description | Included | | Best Sellers Rank | #24,808 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #18 in Box Springs | | Brand Name | Zinus | | Color | Grey | | Compatible With Mattress Size | King | | Customer Reviews | 4.0 out of 5 stars 1,588 Reviews | | Finish Types | Unfinished | | Form Factor | Rectangular | | Furniture Finish | Gray | | Global Trade Identification Number | 00841550372687 | | Included Components | Box Spring, Installation Manual | | Item Depth | 5 inches | | Item Dimensions | 78.7 x 75.5 x 5 inches | | Item Dimensions L x W x H | 78.7"L x 75.5"W x 5"H | | Item Type Name | Quick Assembly Mattress Foundation, Durable Metal Frame | | Item Weight | 35.8 pounds | | Manufacturer | Zinus | | Manufacturer Part Number | ZU-FBSSG1OC-05K | | Material | Alloy Steel | | Material Type | Alloy Steel | | Maximum Weight Recommendation | 700 pounds | | Model Number | ZU-FBSSG1OC-05K | | Number of Items | 1 | | Number of Packs | 1 | | Other Special Features of the Product | Easy assembly, Squeak Resistant | | Product Dimensions | 78.7"L x 75.5"W x 5"H | | Set Name | WonderBox(TM) | | Shape | Rectangular | | Size | King | | Special Feature | Easy assembly, Squeak Resistant | | Style | 5 inch | | Style Name | 5 inch | | UPC | 841550372687 | | Unit Count | 1 Count | ## Product Details - **Size:** King - **Product Dimensions:** 78.7"L x 75.5"W x 5"H - **Special Feature:** Easy assembly, Squeak Resistant - **Color:** Grey - **Finish Type:** Unfinished ## Images ![Zinus 5 Inch King WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Grey - Image 1](https://m.media-amazon.com/images/I/71zuumfEBUL.jpg) ![Zinus 5 Inch King WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Grey - Image 2](https://m.media-amazon.com/images/I/81ydcKK61GL.jpg) ![Zinus 5 Inch King WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Grey - Image 3](https://m.media-amazon.com/images/I/61GaQdWat+L.jpg) ![Zinus 5 Inch King WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Grey - Image 4](https://m.media-amazon.com/images/I/81KDSBqFGtL.jpg) ![Zinus 5 Inch King WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Grey - Image 5](https://m.media-amazon.com/images/I/71Axy9iq0kL.jpg) ## Available Options This product comes in different **Pattern, Size, Style** options. --- ## 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.be/products/641697243-zinus-5-inch-king-wonderbox-tm-smart-box-spring-quick](https://www.desertcart.be/products/641697243-zinus-5-inch-king-wonderbox-tm-smart-box-spring-quick) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-10-07*