It prevent the furniture feet from scratching the floor board.Good choice for protecting your furniture and floor. The dimension corresponds to the outer diameter of the Square tube.The Furniture Foot Protector is made of rubber material, black in color, square shaped. Rubber products are hard to avoid some smell.Here is the way to remove odors: 1. Purchase of rubber special deodorant (available in supermarkets) 2. Scrub with hydrogen peroxide or 84 disinfectant and then air dry 3. Soak in salt water or lemon water for an hour, then air dry.