4 Pack, 38mm, 1-1/2", Sliding Discs With Adhesive, Slide Everything As If It Had Wheels, Move Up To 1600 LB, Won't Scratch Your Floors, Works On Any Surface Wood Floors, Vinyl Flooring, Ceramic Tile & Carpeting. Ideal To Move Chairs, TV's, Coffee Tables, Computers, Printers, Stereos, Floor Plants, As Seen On TV.