These are legs specifically for a Yamazen leg-supported mattress. They were only used for about a week and are very clean with no scratches or stains. Images 1-2 show the legs with caps on the screw parts. There are marks from where they were connected (Image 2). The felt on the bottom of one leg is slightly deformed due to friction, but it hasn't peeled off. Because of the height, you can easily fit storage cases under the bed, and I think it also improves ventilation. I used them with a bed that wasn't Yamazen, but I used them without any wobbling or creaking. This is just my experience, so I'm not sure about using them with anything other than Yamazen products. There are 8 legs because they were used for a split-type bed. No individual sales. Natural wood. Natural color. Screw specification: M8x20mm (metric pitch)