Material: Durable soft silicone and nonwoven fabrics. Fit for chair leg diameter of 17mm-21mm. Caps protect hardwood, ceramic tile, linoleum floors and all hard surfaces from marring and scratches. Can be used on tables, cedar chests, chairs, curio cabinets, desks, and a variety of other furniture items. Anti-slip, no need to stick, simple to wrap, not easy to fall off and durable. The chair leg tips allow your furniture legs to glide smoothly along the floor without sharp noise.