15/16" sq magic slider. Moves everything as if it had wheels. Move up to 3200 lb. Won"t scratch your floors. Works on any kind of surface: Wood floors, vinyl, ceramic tile, and carpeting. Ideal to move armoires, desks, filing cabinets, wall units, sideboards, bookcases, and entertainment centers. Will slide over doorsteps or floor edges with a height difference of up to 3/16". No adhesive required. Color: Grey. As seen on TV. 24mm (15/16") square moves up to 1600 lb., 8 per card