ZINUS 9 Inch Metal Smart Box Spring, Mattress Foundation, Strong Metal Frame, Easy Assembly, Twin
Condition: New
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Extended holiday returns
Returnable until Jan 31, 2026 Learn more
Returnable until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
14 left in stock
Arrives
Tuesday, Nov 18
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Size: Twin
Style: Box Spring (Original)
Features
- Steel Interior Frame With Knitted Polyester Cover
- TWIN DIMENSIONS - The dimensions of this standard twin size box spring are 74 x 38 x 9 inches. The length is 5 inches shorter than our Twin XL size. Please measure your bed frame to ensure compatibility
- THE LAST BOX SPRING YOULL EVER NEED - Crafted from solid steel for lasting strength, and compactly packaged in a single box with all parts and instructions included
- 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 Full, Queen & King sizes can support up to 700 lbs
- VERSATILE FIT - Compatible with all Zinus mattresses and bed frames; please confirm dimensions before using with non-Zinus products
- WARRANTY INCLUDED - Included a 5-year limited warranty for the box spring only; a bed frame is required to support this foundation and is sold separately
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.
Size: Twin
Product Dimensions: 74"L x 38"W x 9"H
Color: Off-white
Included Components: Foundation, Cover
Compatible With Mattress Size: Twin
Size: Twin
Product Dimensions: 74"L x 38"W x 9"H
Color: Off-white
Included Components: Foundation, Cover
Compatible With Mattress Size: Twin
Brand: Zinus
Furniture Finish: White
Product Care Instructions: Wipe with Damp Cloth
Assembly Required: Yes
Manufacturer: Zinus - DROPSHIP
UPC: 841550068610
Form Factor: Box Spring
Global Trade Identification Number: 10
Assembly Instructions Description: Included
Target Audience: unisex-adult
Item Weight: 26.2 pounds
Item model number: OLB-ABS-9T
Is Discontinued By Manufacturer: No
Fabric Type: Steel Interior Frame With Knitted Polyester Cover
Warranty Description: Worry-free 5 year limited warranty included.
Batteries required: No
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Nov 18
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Size: Queen
Style: Box Spring (Original)
This product is great, I am 100% satisfied with this purchase. I am using this box spring with a Nature Sleep memory foam mattress. If you have an innerspring mattress your mileage may vary. My review as follows will cover several different aspects of this product and why they are great. Portability: Who knew you could assemble a box spring instead of lugging around a 50+ pound bulky wooden frame? Once assembled, the frame is lightweight and much easier to move around than a traditional box spring. The next time I move I am just going to take it apart instead of it taking up space in the moving truck, very economical in that sense. Assembly: Assembly was very easy, no mechanical inclinations required from the assembler. The set comes with an allen wrench/hex key and you use that to hold bolts in place while you tighten wingnuts with your fingers. Please ignore any reviewer of this product who said it was too difficult to assemble, took too long, or had confusing instructions, they are either lazy or completely incompetent. It took me about an hour to assemble by myself, and it would have taken even less time if I hadn't been half watching TV and drinking a beer while I was putting it together. The instructions aren't written words, but pictures showing which pieces to assemble with which bolts, but if you ever built a Lego set when you were a kid you should be able to handle this. It is easy to tell which pieces should be facing up during assembly, because most have a 'this side up' sticker. The pieces that don't, it either doesn't matter which side is up or you can tell which side should be up because of the notches the slats will fit into at the end. The Cover/ Looks: The zip cover looks nice and the white sides are a soft plush. Make sure you sweep your floor before zipping the cover on though or you might get dirt all over the nice white part. Some people said that the cover ripped when they were zipping it up, that was not the case for me. The cover is a very tight and perfect fit, but the white sides stretch. So when you zip it on, don't just yank on the zipper as hard as you can, pull up on the white parts that stretch and it will make the zipper easier to close. Durability: It seems sturdy enough to me. I have had for two weeks, no complaints. I have unzipped and re-examined the frame and it has not bent or buckled under the weight of two people or any vigorous activity. Could you bend the metal of the frame after you put it together? I guess you could if you tried to, but why would you do that deliberately? Putting a mattress on top of it and using as intended should leave you with no issues. I hope this review provided all the information needed to help in your purchase decision, and I am sure you will be satisfied with this box spring.
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Reviewed in the United States on April 29, 2015 by Brad
Size: Queen
Style: Box Spring (Original)
This is the perfect item for a very affordable price! I got the 9 inch one and will try to get the 3 inch that better suits my bed.
Reviewed in the United States on October 10, 2025 by Omer Rauf
Size: Twin XL
Style: Box Spring (New Easy Assembly)
The box springs on our King size bed had begun to creak with even the slightest weight on them. When we investigated, we found a wooden frame nailed together and topped with a thin plywood board - so there was no way to tighten the frame and stop the noises. We decided to buy two of the Easy Assembly Zinus Twin XL box springs, hoping that they would be robust enough for use in a rental unit, and that the assembly would not turn out to be a nightmare. We need not to have worried! I assembled the first of the two in 15 minutes, and my wife and I completed the other in 10. Adding the cloth cover was no problem at all, despite some of the comments we have seen from others. Once complete, the two units fitted neatly and easily onto our bedframe. It remains to be seen how long the product lasts, but from the look of it, I expect we will get a good life out of it. The assembled unit is firm and the bed remains comfortable. I am happy to recommend this product.
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Reviewed in the United States on October 28, 2025 by Ian R
Size: King
Style: Box Spring (New Easy Assembly)
This box spring is solid and supports our mattress perfectly. Assembly was quick with clear instructions. Great value and quality—highly recommend
Reviewed in the United States on November 3, 2025 by Victoria Standley
Size: King
Style: Box Spring (Original)
Loved the fact that it arrived in a compact box making it very manageable to carry through the house and into the bedroom as I have a very small and constricted floor plan. Upon opening the box it seemed a bit overwhelming but once I looked at the instructions and the diagram of the labeling of the pieces I was very impressed with how easy it was to lay out and put together. All the hardware fit smoothly and was easy to put together using only the tools that were supplied. That in itself was a touch of class, to be provided those items and not have to find and size up my own tools. The quality of the hardware as well as the packaging was well thought out and I appreciated the extra nuts and bolts. I actually used the extra nuts to double nut the two long bolts that secured the middle cross members together in the center of the box to ensure they don't work their way loose over time. The nuts and bolts looked to be well made and the shouldered and serated locking surfaces of the nuts weren't lost on me. That was a great selection of fasteners. The bolts were made very well and the heads did not ring out or become deformed from being tightened and kept their integrity and shape so as to be removed for disassembley in the future if needed. All the frame work pieces had a very nice finish to them appearing to be powder coated. The final addition of the frame cover was an added item that enhanced the overall quality and appearance of the total package once it was fully assembled. Total assembly time was no more than an hour by myself and being put together on and inside an existing raised oak bedframe with large headboards and side rails. Very pleased with this excellent product and would most definitely buy again and recommend to others looking for a similar item to fit their needs and lifestyle.
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Reviewed in the United States on June 8, 2025 by Dean W. Edwards Jr.
Size: Twin
Style: Box Spring (New Easy Assembly)
This box spring is much better than your traditional wooden ones. It is much dirtier and very easy to assemble. I would definitely recommend this to anyone that is not able to lift heavy objects as it is very light but very strong. Independent ible would definitely buy this product again
Reviewed in the United States on September 21, 2025 by Charles Pulley Charles Pulley