These black round rubber feet are made of high quality thermoplastic rubber material, corrosion resistance, anti-skid, shock-proof, easy installation. Each rubber foot built-in a 304 stainless steel washer, which can enhance the stability of the rubber bumper feet. Widely used in a variety of applications, like rubber cutting board feet, rubber furniture feet, rubber feet for electronics, wood-craft projects, guitar amp feet, non-slip chair and stool feet, and so on.