*Made of pliable (flexible) PP, environment-friendly and tasteless material. *Suitable for spinning pipe sleeve, balance adjustment device, portable roller design *The bottom part is thicker enough and there are anti slip stripes.Fits very snug over the end of tubing and won't fall off due the non-slip internal texture. *Three-dimensional anti-skid surface.floor protector, reduce noise. *Available in a variety of sizes to fulfill all floor protection needs. Offset Caps will give framework a polished modern stance with less chance of tripping over them. *Fit for furniture, gym equipment, medical equipment.