Rubber Dock Bumper 48"x3"x4" 4 length x 3 wide x 4 depth/thickness 13 lbs. A full  thick rubber ribs underneath on all sides Easy installation. 3 holes for mounting are provided Great for Boat Docks, Marinas, Loading Docks, and Parking Spots 100% recycled rubber, finished in black, and wont show dirt, scuffs, or other markings