4 Pack Reinforced Rubber Dock Bumper 6” x 3.25” x 3” inch – Molded Rectangle Buffer for Semi, Truck, Trailer, Flatbed (4 Pack)4 Pack Reinforced Rubber Dock Bumper 6” x 3.25” x 3” inch – Molded Rectangle Buffer for Semi, Truck, Trailer, Flatbed (4 Pack)