--- product_id: 745732561 title: "ZINUS 5 Inch WonderBox(TM) Smart Box Spring Quick Assembly Mattress Foundation, Durable Metal Frame, King, Grey" brand: "zinus" price: "£472.73" currency: GBP in_stock: true url: https://www.desertcart.co.uk/products/745732561-zinus-5-inch-wonderbox-tm-smart-box-spring-quick-assembly store_origin: GB region: United Kingdom --- # Eco-friendly compact packaging Tool-free quick assembly Durable steel frame support ZINUS 5 Inch WonderBox(TM) Smart Box Spring Quick Assembly Mattress Foundation, Durable Metal Frame, King, Grey **Brand:** zinus **Price:** £472.73 **Availability:** ✅ In Stock ## Summary > 🛠️ Effortless setup meets rock-solid support — your mattress’s new best friend! ## Quick Answers - **What is this?** ZINUS 5 Inch WonderBox(TM) Smart Box Spring Quick Assembly Mattress Foundation, Durable Metal Frame, King, Grey by zinus - **How much does it cost?** £472.73 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/745732561-zinus-5-inch-wonderbox-tm-smart-box-spring-quick-assembly) ## 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, this foundation guarantees peace of mind for years to come. - • **Snap & Sleep in Minutes:** Tool-free design means zero frustration and setup in under 10 minutes. - • **Customizable Sleep Height:** Choose between 5 or 9 inches to tailor your bed’s profile and elevate your comfort zone. - • **Built to Last, Built for Comfort:** Heavy-duty alloy steel frame ensures your mattress stays perfectly supported night after night. ## Overview The ZINUS 5 Inch WonderBox Smart Box Spring is a king-size mattress foundation featuring a durable powder-coated alloy steel frame and a tool-free, quick assembly design. Delivered in an eco-friendly compact box, it offers customizable height options (5 or 9 inches) and comes with a 5-year warranty, ensuring long-lasting mattress support and easy setup for a cleaner planet and better sleep. ## 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 | |---------------|-------| | Color | Grey | | Product Dimensions | 199.9 x 191.77 x 12.7 cm; 16.24 kg | | Is Assembly Required | Yes | | Assembly Type | Included | | Primary material | Alloy Steel | | Finish Type | Powder Coated | | Style | 5 inch | | Capacity | King | | What is in the box? | Box Spring, Instruction Sheet | | Item Shape | Rectangular | | Mattress Comfort | Rectangular | | Number of Shelves | 1 | | Shipping Weight | 16.76 Kilograms | | Item Model Number | ZU-FBSSG1OC-05K | | Manufacturer | Zinus | | Item model number | ZU-FBSSG1OC-05K | | ASIN | B0D2VP2JDK | ## Product Details - **Size:** King - **Material:** Alloy Steel - **Product dimensions:** 199.9L x 191.8W x 12.7H centimeters - **Style:** 5 inch - **Special features:** Easy assembly, Squeak Resistant ## Images ![ZINUS 5 Inch WonderBox(TM) Smart Box Spring Quick Assembly Mattress Foundation, Durable Metal Frame, King, Grey - Image 1](https://m.media-amazon.com/images/I/71zuumfEBUL.jpg) ![ZINUS 5 Inch WonderBox(TM) Smart Box Spring Quick Assembly Mattress Foundation, Durable Metal Frame, King, Grey - Image 2](https://m.media-amazon.com/images/I/81ydcKK61GL.jpg) ![ZINUS 5 Inch WonderBox(TM) Smart Box Spring Quick Assembly Mattress Foundation, Durable Metal Frame, King, Grey - Image 3](https://m.media-amazon.com/images/I/61GaQdWat+L.jpg) ![ZINUS 5 Inch WonderBox(TM) Smart Box Spring Quick Assembly Mattress Foundation, Durable Metal Frame, King, Grey - Image 4](https://m.media-amazon.com/images/I/81KDSBqFGtL.jpg) ![ZINUS 5 Inch WonderBox(TM) Smart Box Spring Quick Assembly Mattress Foundation, Durable Metal Frame, King, Grey - Image 5](https://m.media-amazon.com/images/I/71LWb9gHdkL.jpg) ## Available Options This product comes in different **Color, Size** 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.co.uk/products/745732561-zinus-5-inch-wonderbox-tm-smart-box-spring-quick-assembly](https://www.desertcart.co.uk/products/745732561-zinus-5-inch-wonderbox-tm-smart-box-spring-quick-assembly) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-26*