Amazon Basics Smart Box Spring Bed Base, 9-Inch Height Mattress Foundation, Tool-Free Easy Assembly, Twin, 74"L x 38"W x 9"H, White
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Availability:
In Stock.
Arrives
Wednesday, Nov 19
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Size: Twin(74"L x 38"W)
Style: 9-Inch Height
Features
- COMFORT AND SUPPORT BOOST: Enhances mattress comfort and stability
- VERSATILE MATTRESS COMPATIBILITY: Supports all mattress types - spring, memory foam, latex and hybrid
- IMPRESSIVE WEIGHT CAPACITY: Twin size supports 350 lbs; Full, Queen, King & California King sizes hold up to 700 lbs total (350 lbs per person max for all sizes)
- EASILY SETUP: Tool-free, interlocking design assembles in minutes
- ROBUST DUARABLE STEEL CONSTRUCTION: Durable frame with horizontal slats for strong mattress support
- EASY-CLEAN DESIGN: Removable two-piece zip cover for convenient spot cleaning
- Product Dimension: 74"L x 38"W x 9"H (Length x Width x Height)
Description
Amazon Basics Mattress Foundation / Smart Box Spring for Twin Size Bed, Tool-Free Easy Assembly - 9-Inch, Twin From the Manufacturer Amazon Basics, this product may originate from [China] or [Vietnam]
Item Weight: 24.9 pounds
Product Dimensions: 74 x 38 x 9 inches
Item model number: AMZ-9KDBS-T2
Date First Available: December 21, 2018
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Nov 19
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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Top Amazon Reviews
Size: Queen(79"L x 59.5"W)
Style: 5-Inch Height
This is a great bed frame with good instructions and easy to assemble by yourself. Sturdy, no creaking, smooth edges all around and fit right into my queen size wood bed frame. Perfect! Highly recommend.
Reviewed in the United States on October 6, 2025 by KAP BeadWorks
Size: Queen(79"L x 59.5"W)
Style: 9-Inch Height
The box spring in a guest bedroom was creaking badly and I didn’t want to spend a ton of money to replace it. When I found this option, I thought I’d give it a try. I am a 71 yr old female and I put the frame together in about 10 minutes - super easy with clear instructions. The cover was also easy to put on and zip up. I like the way the slats are metal - 10 of them are used making the base sturdy, but light enough that my husband and I could easily move it into place. It fit perfectly on my queen bed frame and with the mattress it is very comfortable and no creaking! I can’t speak to its longevity since it is in a guest bedroom that is only used several times throughout the year. But so far it has been perfect for what I need.
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Reviewed in the United States on September 28, 2025 by Deb Johnson
Size: Twin(74"L x 38"W)
Style: 9-Inch Height
Easy to setup in less than 15 minutes. Provides excellent support to the mattress above. No tools necessary as the four “screws” are thumb screws. Cover is conveniently labeled to know which side is up. Functions as you need it to! The thick cover even prevents creaks and squeaks when placed on metal bed rails. We needed a box spring and I shopped around between Amazon and some big box stores. The cheapest traditional box spring option in stores was over double the cost, and like usual would have to be delivered to our home instead of hauled out of the store that same day. This “smart” box showed up next day and saved over 50%. Looking at or laying on the bed, no one would ever guess that this wasn’t a traditional wood framed box spring.
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Reviewed in the United States on August 13, 2025 by Robert G
Size: Queen(79"L x 59.5"W)
Style: 7-Inch Height
Well made fairly easy to put together by one person but pulling the way too small cover takes 30 minutes so you do not rip it as a few reviews indicated. It goes on easy once you have to figure it out from the horrible directions no words in english. Turning the last corner the fabric is 5 inches to short you have pull hard from other areas to work it to get it over the last corner at the same time you have to be careful not to rip it or the thin zipper off . If they made the cover a few inches bigger you still could get the frim fit without the ridiculous hassell of pulling it hard.
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Reviewed in the United States on July 16, 2025 by Guitarstar
Size: Full(74"L x 53"W)
Style: 5-Inch Height
I had to return this foundation because it did not fit my antique full bed. However, I was impressed by the high quality, good design and easy assembly. It appears to be very well made, and is great quality for price. I am also impressed with the packaging. It was so easy to replace the items in the shipping box -- perfect for. I am also amazed that Amazon is doing a free pick-up, so I will not have to lug this heavy, awkward box to the UPS store.
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Reviewed in the United States on July 11, 2025 by Gammakins
Size: Full(74"L x 53"W)
Style: 5-Inch Height
This was so easy to assemble. Great instructions, no tools needed. Very sturdy, I am amazed! Great product!!
Reviewed in the United States on October 10, 2025 by L Pope
Size: King(79"L x 75.5"W)
Style: 9-Inch Height
I was skeptical but decided to trust the reviews. This product arrived on time and took two of us about 15 minutes to put together. Very easy. No written instructions just pictures but easy to understand. Appears to be sturdy and a good value for the $$. Will update this review if anything changes. In the photo it is under Coolvie pure comfort king mattress.
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Reviewed in the United States on September 17, 2025 by Kindle Customer
Size: Queen(79"L x 59.5"W)
Style: 7-Inch Height
2 small girls share this bed,. 1 is 120 lbs, the other is 100lbs. We purchased a new mattress and this box support 4 months ago for the existing queen frame in their room. we also were replacing the traditional spring mattress with a hybrid so we changed support style to steel slat box to give firmer coverage to the mattress design as recommended by the mattress mfr. If you look at the 3rd photo in the ad, where the steel frame is being assembled by a hand inserting 1 of the rods, you can catch an inward curve of the side of the outer rails both upper and lower edge. This true on mine as well and ended up becoming the 1st issue. the corners measured fine and went to the proper measurement for our queen base, and sit perfectly square on the bed frame, but the middle on 1 side rolls inward, narrowest was a full centimeter narrower than the corners. This got worse over time and eventually let the box slip off the frame when it began to flex the 2nd or 3rd month we had it in use (after the 30 day return had ended). I eventually remeasured, and yes it had lost several more millimeters from flexing. So I ended up bending the frame of the bed on the side to give additional support. That helped for a couple of months. yesterday, 1 corner of the bed dropped 4 inches or so from the corner to the middle of the bed, the other 3 stayed at height. one of the girls was sitting on that corner putting on her boots and it just suddenly DROPPED she said. I flipped up the mattress and removed the box cover. The upper and lower rails of the frame are pre-made with support ribs every foot or so to give it strength and maintain rigidity. 3 of the bars on the collapsed corner had broken their spot welds, and the cause of this was the premade corner joint metal had flexed and broken and you can see the weld was poor so the corner was weak and eventually gave way. This is not due to excess weight, or kids playing bounce games on the bed. It was used by 2 slender teenage sisters with a total weight of 220 lbs, the frame is rated at over 600. The only reason this happened is the welds could not withstand the on and off application of weight and flexed till they broke. since the corner holds the angle and shape integrity, once it broke the supports ribs then had to absorb the now moving rail spacing and eventually their welds cracked. Steel that is rated over 600lbs needs to be durable enough to hold 220 lbs forever, not measured to not collapse with 600 for 10 seconds and then claim "Hold 600 lbs!". Less than 225 lbs over 4 months bent it more which should not happen even if it started slightly curved, it bent more over time because the weak metal flexed stressing the weld joints till they physically cracked likely 1 at a time. It simply isnt a sturdy or high quality piece. It was curved when it arrived. I addressed that by making the frame cirve to make sure it didnt have a less supported rail on 1 side. The 2 months later the welds cracked on 1 corner. I dont even want to warranty it after seeing how it failed. , I expect the same issues will repeat. I assembled it myself, and noticed the slight curve even when I put it together. but the bed frame still had a grip on the box enough it looked like it wasnt perfect but should manage. I liked the high star rating which is why I bought it. Thousands of purchases. However I am a mechanic by trade, with a welding certification and 30 years experience. I do not want this frame again. It has inherent weaknesses in its construction quality that wont affect it for everyone when new, but will make it fail earlier than needed even if you get a better one than the defective one I apparently got. You get what you pay for. There is a reason this box support is 100 dollars cheaper than many of its competitors.
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Reviewed in the United States on October 8, 2023 by Kelly M. Garvey