--- product_id: 718661944 title: "Zinus 7 Inch King Metal Smart Box Spring with Quick Assembly, Mattress Foundation, Strong Metal Frame, Easy Assembly" brand: "zinus" price: "12906 zł" currency: PLN in_stock: true reviews_count: 5 category: "Zinus" url: https://www.desertcart.pl/products/718661944-zinus-7-inch-king-metal-smart-box-spring-with-quick store_origin: PL region: Poland --- # 700 lbs max weight support Compact all-in-one packaging Quick tool-free assembly Zinus 7 Inch King Metal Smart Box Spring with Quick Assembly, Mattress Foundation, Strong Metal Frame, Easy Assembly **Brand:** zinus **Price:** 12906 zł **Availability:** ✅ In Stock ## Summary > 🛏️ Build your sleep fortress in minutes—strong, sleek, and stress-free! ## Quick Answers - **What is this?** Zinus 7 Inch King Metal Smart Box Spring with Quick Assembly, Mattress Foundation, Strong Metal Frame, Easy Assembly by zinus - **How much does it cost?** 12906 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/718661944-zinus-7-inch-king-metal-smart-box-spring-with-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 - • **Peace of Mind Warranty:** Backed by a 5-year limited warranty, because quality sleep deserves lasting support. - • **Rock-Solid Steel Frame:** Durable alloy steel supports up to 700 lbs, ensuring your mattress stays perfectly stable night after night. - • **Versatile King Size Fit:** Generous 7-inch height and king dimensions provide the perfect foundation for your premium mattress. - • **Effortless Setup in Minutes:** Tool-free locking brackets mean no fumbling with bolts—get your foundation ready faster than ever. - • **Compact & Convenient Packaging:** Everything you need arrives in one sleek box, making delivery and setup a breeze. ## Overview The Zinus 7 Inch King Metal Smart Box Spring combines a durable alloy steel frame with a quick, tool-free assembly design. Supporting up to 700 lbs, it offers a stable foundation for king-size mattresses, all packed in a compact box for easy delivery. With a 5-year limited warranty, it’s engineered for long-lasting, dependable mattress support. ## 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. Review: Easy to assemble but it is so creaky! I tried tightening it every time it would creak again but the logistics behind that are just a pain in the butt. Investing in the foundation from the place I purchased my mattress instead. My friend recommended this to me and she has no issues with noise so maybe I got a defect? Review: It's okay. There are no feet as seen in the picture. None of the parts are labeled (that wasn't fun) Instructions show pictures and although the instructions indicate the labels of each part...the parts don't have them so it took so much longer to assemble. You have to keep referencing the inmages to make sure it's the correct part. I haven't slept on it yet... we shall see. ## Features - STRONG, DEPENDABLE, AND READY IN NO TIME - As if its ultra-durable steel structure and convenient packaging weren’t impressive enough, our original Smart BoxSpring has been given a quick-assembly upgrade - DURABLY ENGINEERED - Durable steel is used to construct the inside framework of this foundation; twin/twin xl sizes support a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs - EASIER THAN EVER ASSEMBLY - With fewer bolts and tool-free locking brackets for intuitive setup, assembly takes only minutes to complete - THOUGHTFULLY PACKAGED - All parts and instructions are packed into one compact box that ships straight to your door - Worry-free 5 year limited warranty included; box spring only, a bed frame or platform bed is required to support this foundation and is sold separately ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09XM6BPL1 | | Brand Name | Zinus | | Color | Grey | | Customer Reviews | 4.1 4.1 out of 5 stars (608) | | Finish Types | Steel | | Form Factor | 7 inch box spring | | Furniture Finish | Alloy Steel | | Global Trade Identification Number | 00841550325362 | | Ground To Item Distance | 7 Inches | | Headboard Material | Fabric | | Included Components | Steel Frame, Cover | | Item Depth | 7 inches | | Item Dimensions | 199.9 x 191.8 x 17.8 centimeters | | Item Dimensions L x W x H | 199.9L x 191.8W x 17.8H centimeters | | Item Type Name | Box Spring | | Item Weight | 20 kg | | Manufacturer | Zinus | | Manufacturer Part Number | ZU-ABS-7KS | | Material Type | Alloy Steel Fabric | | Maximum Weight Recommendation | 700 Pounds | | Model Number | ZU-ABS-7KS | | Other Special Features of the Product | Durable | | Product Care Instructions | Wipe with Dry Cloth | | Required Assembly | Yes | | Set Name | King 7 inch New Quick Assembly | | Shape | Rectangular | | Size | King | | Style Name | New/upgraded with quick assembly | | UPC | 841550325362 | ## Product Details - **Material:** Alloy Steel Fabric - **Product dimensions:** 199.9L x 191.8W x 17.8H centimeters - **Size:** King - **Special features:** Durable - **Style:** New/upgraded with quick assembly ## Images ![Zinus 7 Inch King Metal Smart Box Spring with Quick Assembly, Mattress Foundation, Strong Metal Frame, Easy Assembly - Image 1](https://m.media-amazon.com/images/I/61e4dd+fl8L.jpg) ![Zinus 7 Inch King Metal Smart Box Spring with Quick Assembly, Mattress Foundation, Strong Metal Frame, Easy Assembly - Image 2](https://m.media-amazon.com/images/I/81BbnifKE+L.jpg) ![Zinus 7 Inch King Metal Smart Box Spring with Quick Assembly, Mattress Foundation, Strong Metal Frame, Easy Assembly - Image 3](https://m.media-amazon.com/images/I/61rgA7n5Z-L.jpg) ![Zinus 7 Inch King Metal Smart Box Spring with Quick Assembly, Mattress Foundation, Strong Metal Frame, Easy Assembly - Image 4](https://m.media-amazon.com/images/I/817Eo9cK32L.jpg) ![Zinus 7 Inch King Metal Smart Box Spring with Quick Assembly, Mattress Foundation, Strong Metal Frame, Easy Assembly - Image 5](https://m.media-amazon.com/images/I/71LXSplDg1L.jpg) ## Available Options This product comes in different **Size, Style** options. ## Questions & Answers **Q: Are any tools required to assemble my box spring?** A: Yes, just a few! But 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 (sold separately) 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 ### ⭐ Review *by L***N on 20 March 2026* Easy to assemble but it is so creaky! I tried tightening it every time it would creak again but the logistics behind that are just a pain in the butt. Investing in the foundation from the place I purchased my mattress instead. My friend recommended this to me and she has no issues with noise so maybe I got a defect? ### ⭐⭐⭐ Review *by M***I on 5 October 2024* It's okay. There are no feet as seen in the picture. None of the parts are labeled (that wasn't fun) Instructions show pictures and although the instructions indicate the labels of each part...the parts don't have them so it took so much longer to assemble. You have to keep referencing the inmages to make sure it's the correct part. I haven't slept on it yet... we shall see. ### ⭐⭐⭐⭐⭐ Review *by H***C on 22 December 2025* Whoever made this is a genius. We both drive small cars and box springs were SO expensive before even finding a way to get it home. This showed up in a nice little box, it was easy to assemble and our king size mattress is sitting comfortably! Plus, for the future it will be super easy to move. Freaking love this thing and will never buy a wooden box spring again --- ## 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.pl/products/718661944-zinus-7-inch-king-metal-smart-box-spring-with-quick](https://www.desertcart.pl/products/718661944-zinus-7-inch-king-metal-smart-box-spring-with-quick) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-27*