--- product_id: 551153730 title: "ZINUS 7 Inch Metal Smart Box Spring/Mattress Foundation/Strong Metal Frame/Easy Assembly, California King" brand: "zinus" price: "€ 490.26" currency: EUR in_stock: false reviews_count: 5 url: https://www.desertcart.hr/products/551153730-zinus-7-inch-metal-smart-box-spring-mattress-foundation-strong store_origin: HR region: Croatia --- # compact all-in-one packaging 700 lbs weight capacity 5-min easy assembly ZINUS 7 Inch Metal Smart Box Spring/Mattress Foundation/Strong Metal Frame/Easy Assembly, California King **Brand:** zinus **Price:** € 490.26 **Availability:** ❌ Out of Stock ## Summary > 🛏️ Elevate your sleep game with the last box spring you'll ever need! ## Quick Answers - **What is this?** ZINUS 7 Inch Metal Smart Box Spring/Mattress Foundation/Strong Metal Frame/Easy Assembly, California King by zinus - **How much does it cost?** € 490.26 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/551153730-zinus-7-inch-metal-smart-box-spring-mattress-foundation-strong) ## 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 - • **Sleek & Subtle Design:** Modern grey steel finish with a low-profile 7-inch height to complement any bedroom aesthetic. - • **Built to Last, Backed to Trust:** Solid steel frame engineered for durability and a 5-year peace of mind warranty. - • **Effortless Setup, Instant Upgrade:** Assembles in minutes with included tools and instructions—no sweat, no hassle. - • **Compact Shipping, Maximum Convenience:** All parts and tools arrive in one box, ready to transform your sleep space. - • **Heavyweight Support for Heavy Sleepers:** Supports up to 700 lbs (California King), ensuring stability for every dreamer. ## Overview The ZINUS 7 Inch Metal Smart Box Spring is a robust mattress foundation crafted from durable alloy steel, designed to support up to 700 lbs for California King sizes. Featuring a sleek grey finish and a low-profile 7-inch height, it ships compactly with all tools included for quick assembly. Backed by a 5-year warranty, it offers a reliable, stylish, and hassle-free upgrade to your bedroom setup. ## Description We like to think of a box spring as the backbone for your mattress. The best kind should be flat, level and built to keep your mattress in tiptop shape; and that’s just what the Smart Box Spring does! With its easily assembled, dependable steel structure, you can rest assured that your mattress will be sitting pretty. An included poly jacquard cover blends with the rest of your bedroom, and with a variety of different thicknesses to choose from, you can pick the one you need to customize the height of the bed. 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 - THE LAST BOX SPRING YOU’LL EVER NEED - Unlike a traditional box spring, the Smart box spring is made of solid steel that comes together in no time and is backed by our ZINUS “Peace of Mind” 5 year warranty - DURABLY ENGINEERED - Durable steel is used to construct the inside framework of this foundation; twin size supports a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs - THOUGHTFULLY PACKAGED - All parts, tools and instructions are packed into one compact box that ships straight to your door - Box spring only, a bed frame or platform bed is required to support this foundation and is sold separately - Worry-free 5 year limited warranty included - This item arrives in one shipping box ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B01MY3154J | | Brand Name | Zinus | | Color | Grey | | Compatible With Mattress Size | California king | | Customer Reviews | 4.5 4.5 out of 5 stars (16,870) 4.5 out of 5 stars | | Finish Types | Steel | | Form Factor | Rectangular Box Spring | | Furniture Finish | Alloy Steel | | Global Trade Identification Number | 00841550100143 | | Included Components | Bed Frame, Installation Manual, Tools | | Item Depth | 71.5 inches | | Item Dimensions | 2.11 x 1.82 x 0.18 Meters | | Item Dimensions L X W X H | 2.11L x 1.82W x 0.18H Meters | | Item Type Name | Box Spring | | Item Weight | 20.15 kg | | Manufacturer | Zinus | | Manufacturer Part Number | OLB-ABS-7CK | | Material Type | Alloy Steel | | Maximum Weight Recommendation | 700 Pounds | | Model Number | OLB-ABS-7CK | | Other Special Features Of The Product | Durable | | Product Care Instructions | Wipe with Dry Cloth | | Required Assembly | Yes | | Shape | Rectangular | | Size | California King | | Style Name | Original | | Unit Count | 1 Count | | Upc | 841550100143 | ## Product Details - **Size:** California King - **Material:** Alloy Steel - **Product dimensions:** 2.11L x 1.82W x 0.18H Meters - **Style:** Original - **Special features:** Durable ## Images ![ZINUS 7 Inch Metal Smart Box Spring/Mattress Foundation/Strong Metal Frame/Easy Assembly, California King - Image 1](https://m.media-amazon.com/images/I/81ArKY6Nk0L.jpg) ![ZINUS 7 Inch Metal Smart Box Spring/Mattress Foundation/Strong Metal Frame/Easy Assembly, California King - Image 2](https://m.media-amazon.com/images/I/71cBRBuCIdL.jpg) ![ZINUS 7 Inch Metal Smart Box Spring/Mattress Foundation/Strong Metal Frame/Easy Assembly, California King - Image 3](https://m.media-amazon.com/images/I/81rbNHGvsbL.jpg) ![ZINUS 7 Inch Metal Smart Box Spring/Mattress Foundation/Strong Metal Frame/Easy Assembly, California King - Image 4](https://m.media-amazon.com/images/I/81hn4h5D6FL.jpg) ![ZINUS 7 Inch Metal Smart Box Spring/Mattress Foundation/Strong Metal Frame/Easy Assembly, California King - Image 5](https://m.media-amazon.com/images/I/91z3urK4K3L.jpg) ## Available Options This product comes in different **Pattern Name, Size** options. ## Questions & Answers **Q: Are any tools required to assemble my box spring?** A: 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 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 ### ⭐⭐⭐⭐⭐ Works great *by on Reviewed in Canada 8 January 2025* We have three of these mattress foundations at our cottage and they are great! Fairly easy to put together once you figure out the numbering system. Of course, constructing foundation numbers 2 and 3 was way easier to do once number 1 was done and the numbering system was clear to me. The foundation feels solid and there are no squeaky bits as you move around in the bed. Would buy again. ### ⭐⭐⭐⭐⭐ One Word. Fantastic! *by on Reviewed in the United States 23 February 2019* I NEVER write a product review but always look at others when considering a product and felt compelled to provide one to Zinus because they simply deserve it. I searched all over town for a new full size box spring for my 10 year old son's convertible "crib to bed" as we had a great mattress but the boxspring was a bunkie board made of wood (1x 2's) and literally a flat piece of cardboard. Every time he turned in bed, jumped on bed, parents were in bed reading etc., the bed was the loudest bed I have ever heard and it finally drove me to insanity. My search began with the retail mattress stores as well as Costco (big fan!) etc. No one had them in stock and it would be deliverable in two weeks, couldn't tell me a price, horrible customer service and the list goes on and on. I got tired of the hunt and thought I'd try Amazon.com with zero expectations of even finding one. I quickly found several companies offering box springs and settled in on the options that Zinus offered and did my research. I chose the metal version and paid. two days later it was at my front door and twenty minutes later I had it put together and my son even assisted me. One box, makes ZERO noise, quick assembly, awesome support for mattress, perfect fit (I did measure his bed frame etc. prior to purchasing), lightweight but solid, incredibly strong, and only around $95.00 total. Kudos to Zinus for a fantastic product and know that my next box spring will be purchased from you! ### ⭐⭐⭐⭐⭐ Strong and yet affordable *by on Reviewed in the United States 24 February 2020* Had never heard of a box spring that is not made from wood. At first, I was skeptical to order a box spring from steel. My skepticism then got slightly worse when I read some negative reviews about "OHM, it takes too long to assemble!" Being an engineer and an optimist upon reading majority of great reviews, I went ahead and placed an order for queen box spring.Not only it arrived in time but it was also well-packed. It is heavy and you will need 2 people to carry the box from outside to your bedroom. Once I unopened the box, I was surprised to find the individual pieces tied up in groups based where they all go. Every single piece is numbered and lettered. A piece numbered "1" connects to another piece numbered "1", numbered "2" connects with another numbered "2". Very simple and easy. The kit also comes with tools. The part breakdown is as per below:A (inner long rail) = 2B (inner short rail) = 1C (outer short rail) = 2D (outer long rail-1) = 2E (outer long rail-2) = 2F (Slats) = 10S (shortest screws) = 8M (mid-length screws) = 4L (long screws) = 2H (nuts) = 10The best advice is that open the box, remove the cable ties, lay out all parts on floor as per the intended connection and get an idea of who connects to who (without actually assembling). It is otherwise called a "raw" or a "draft" assembly". Once it is done, it takes 30 minutes MAX to connect all components. I then put the cover on it and zipped it up. Voila, it was now ready to be placed on the bed. The moment of truth was moments away. My daughter and I lifted it up and placed it on her queen bed. It fit perfectly. We then put the mattress and lied down on it. It is very sturdy and does not squeak upon rolling. Overall, it is very strong and affordable. Here is the best part. It can be unassembled and moved to another place much easily (than the traditional wood box spring).I highly recommend it. Buy it with full confidence! --- ## 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.hr/products/551153730-zinus-7-inch-metal-smart-box-spring-mattress-foundation-strong](https://www.desertcart.hr/products/551153730-zinus-7-inch-metal-smart-box-spring-mattress-foundation-strong) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-09-26*