door stops of metal; caster cups, made predominately of metal, for placement between furniture and hard and carpeted floors with which they would otherwise come into direct contact, in order to prevent damage to furniture, floors, and carpet, and in order to reduce or prevent skidding and noise

door stops of rubber

door stops of plastic; door stops of wood; furniture casters, made predominately of materials other than metal, for household, commercial and industrial use; felt pads, coasters, grippers, and bumpers, made predominately of materials other than metal, for placement between furniture and floors, and for placement between hard surfaces and delicate surfaces with which they would otherwise come into direct contact, in order to reduce or prevent scratching and scuffing, and in order to reduce or prevent skidding and noise; and coasters and caster cups, made predominately of materials other than metal, for placement between furniture and hard and carpeted floors with which they would otherwise come into direct contact, in order to prevent damage to furniture, floors, and carpet, and in order to reduce or prevent skidding and noise