--- product_id: 687896804 title: "ZINUS 9 Inch WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Full, Grey" brand: "zinus" price: "£361.18" currency: GBP in_stock: true reviews_count: 5 category: "Zinus" url: https://www.desertcart.co.uk/products/687896804-zinus-9-inch-wonderbox-tm-smart-box-spring-quick-assembly store_origin: GB region: United Kingdom --- # Tool-free assembly in minutes Dual height options for custom comfort Durable steel frame supports up to 4400 lbs ZINUS 9 Inch WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Full, Grey **Brand:** zinus **Price:** £361.18 **Availability:** ✅ In Stock ## Summary > 🛏️ Elevate your sleep, simplify your life. ## Quick Answers - **What is this?** ZINUS 9 Inch WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Full, Grey by zinus - **How much does it cost?** £361.18 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/687896804-zinus-9-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 - • **Snap & Sleep Setup:** Effortless tool-free assembly gets you resting faster—no frustration, just comfort. - • **Eco-Smart Packaging:** Compact WonderBox delivery reduces waste and breezes through tight spaces. - • **Steel-Strong Support:** Robust metal frame engineered to maximize mattress lifespan and stability. - • **Tailored Height Boost:** Choose between 5” or 9” heights to elevate your mattress and your sleep game. - • **Sleep Assured Warranty:** 5-year worry-free coverage means your foundation is built to last. ## Overview The ZINUS 9 Inch WonderBox Smart Box Spring offers a durable steel frame foundation with a tool-free, quick assembly design. It supports up to 4400 pounds and features customizable height options (5” or 9”) to optimize mattress comfort. Delivered in eco-friendly compact packaging, it includes a 5-year warranty for long-lasting peace of mind. ## Description Product 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. Safety Warning Do not exceed a total weight of 700 pounds on the box spring. Be cautious of sharp edges and pinch points during assembly. Always follow the included assembly instructions to ensure stability and prevent collapse. Regularly inspect your box spring for any signs of wear or damage, and follow the care instructions to maintain its longevity. Review: Super easy to put together, thank you. Review: esta muy chica de ancho mi colchon es individual y esta mas grande que esto pero de ahi en fuera facil de armar y no es muy caro ## 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 | B0D2VNZ4T8 | | Brand | Zinus | | Colour | Grey | | Customer Reviews | 4.0 4.0 out of 5 stars (1,181) | | Date First Available | 24 May 2024 | | Item Weight | 13.5 kg | | Maximum Weight Capacity | 4400 Pounds | | Model Number | ZU-FBSSG1OC-09F | | Product Dimensions | 187.45 x 134.62 x 22.86 cm; 13.48 kg | | Special Features | Tool-free Assembly | ## Product Details - **Material:** Alloy Steel - **Product dimensions:** 187.5L x 134.6W x 22.9H centimetres - **Size:** Double - **Special feature:** Tool-free Assembly - **Style:** 9 inch ## Images ![ZINUS 9 Inch WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Full, Grey - Image 1](https://m.media-amazon.com/images/I/319+gr9O0-L.jpg) ![ZINUS 9 Inch WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Full, Grey - Image 2](https://m.media-amazon.com/images/I/31CW7yZLbBL.jpg) ![ZINUS 9 Inch WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Full, Grey - Image 3](https://m.media-amazon.com/images/I/410lJZD7zbL.jpg) ![ZINUS 9 Inch WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Full, Grey - Image 4](https://m.media-amazon.com/images/I/41cp9IpAIhL.jpg) ![ZINUS 9 Inch WonderBox(TM) Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Full, Grey - Image 5](https://m.media-amazon.com/images/I/41u+wotsubL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by V***N on 16 January 2026* Super easy to put together, thank you. ### ⭐⭐⭐ Review *by S***O on 18 July 2025* esta muy chica de ancho mi colchon es individual y esta mas grande que esto pero de ahi en fuera facil de armar y no es muy caro ### ⭐⭐⭐⭐⭐ Review *by A***3 on 19 November 2025* I’m honestly impressed with this foundation. I bought the king size and was expecting it to be heavy and complicated, but it was actually very easy to put together. The frame feels solid once it’s assembled, and it doesn’t wobble or shift when you get in and out of bed. What I like the most is that it makes absolutely no noise. No squeaks, no movement sounds at all. The support is firm in a good way, and the surface feels steady under the mattress. It also doesn’t weigh as much as I expected, so moving it around wasn’t a problem. Overall, it looks clean, feels durable, and holds the mattress perfectly without sliding. The height is perfect to match the regular bed headboard. (4 " works )Great buy. ## Frequently Bought Together - Zinus 9 Inch WonderBoxTM Smart Box Spring, Quick Assembly Mattress Foundation, Durable Metal Frame, Full - Utopia Bedding Water and Bed Bug Proof Mattress Encasement (Full) - ZINUS Shawn 35.5 cm Metal SmartBase Bed Frame, Platform Bed Frame Without Box Spring, Sturdy Steel Frame, Under Bed Storage, Twin --- ## 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/687896804-zinus-9-inch-wonderbox-tm-smart-box-spring-quick-assembly](https://www.desertcart.co.uk/products/687896804-zinus-9-inch-wonderbox-tm-smart-box-spring-quick-assembly) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-25*