Amazon Basics Smart Box Spring Bed Base, 9-Inch Height Mattress Foundation, Tool-Free Easy Assembly, King, 79"L x 75.5"W x 9"H, White
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Availability:
In Stock.
Arrives
Sep 6 – Sep 7
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Size: King(79"L x 75.5"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 250 lbs; Full, Queen, King & California King sizes hold up to 700 lbs total (250 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: 79"L x 75.5"W x 9"H (Length x Width x Height)
Description
An Amazon Brand. From the Manufacturer Amazon Basics, this product may originate from [China] or [Vietnam]
Size: King(79"L x 75.5"W)
Product Dimensions: 79"L x 75.5"W x 9"H
Special Feature: Durable
Color: White
Finish Type: Unfinished
Size: King(79"L x 75.5"W)
Product Dimensions: 79"L x 75.5"W x 9"H
Special Feature: Durable
Color: White
Finish Type: Unfinished
Included Components: Screw
Compatible With Mattress Size: King
Furniture Finish: Metal
Assembly Required: Yes
UPC: 190517873898
Global Trade Identification Number: 98
Item Weight: 42.2 pounds
Item model number: AMZ-9KDBS-K2
Date First Available: December 21, 2018
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sep 6 – Sep 7
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: King(79"L x 75.5"W)
Style: 7-Inch Height
This boxspring is fantastic. It was very simple to assemble, took less than half an hour. And it does NOT squeak. I am super impressed with it. Very sturdy. Very supportive and functional.
Reviewed in the United States on July 26, 2025 by bethyleigh_
Size: Queen(79"L x 59.5"W)
Style: 5-Inch Height
Great 5 inch box spring, high quality, and easy to put together. I bought the queen size and it fit perfectly. I watched the Amazon videos which helped a lot. Very happy and you will be too. Thank you Amazon.
Reviewed in the United States on July 28, 2025 by music_collector
Size: King(79"L x 75.5"W)
Style: 7-Inch Height
Our delivery got lost at Amazon so took a couple days longer than expected, but when it arrived it was very easy to set up. Did it by my self in 5 minutes. Fit our bed perfect and seems sturdy enough for those late night activities with no issues.
Reviewed in the United States on August 1, 2025 by Joseph
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: King(79"L x 75.5"W)
Style: 5-Inch Height
Was super easy to assemble. I needed something shorter than my last box spring. Bed sat too high and as I am getting older it is getting more difficult for me to climb in and out of it. I purchased the 5" king sized box spring and my mattress now sits much lower making the bed easier to climb in and out of. Box spring is sturdy and makes less noise than the prior box spring. All in all I am impressed for the price I paid.
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Reviewed in the United States on June 25, 2025 by Destinie
Size: Queen(79"L x 59.5"W)
Style: 5-Inch Height
Easy to assemble and fit into the bedframe easily. No issues with support or movement. Did have to make sure the measurements were right, but overall a good find!
Reviewed in the United States on July 25, 2025 by Jason Dudich
Size: King(79"L x 75.5"W)
Style: 9-Inch Height
Very easy to install, took us no time, the quality is amazing, very sturdy and great overall functionality and mattress support wise. We purchased this to raise our bed higher due to our new bed frame being too low.
Reviewed in the United States on August 2, 2025 by Adrianne Atkinson
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