"These molded bumpers are built to endure years of abusive pounding. Common Usage Protects against the heavy impact, Dimensions L x W x H in. 16 x 5 x 2, Mounting Hardware Included No, Material Type Fiber-reinforced prime rubber containing nylon, polyester. Manufactured from fiber reinforced prime rubber containing nylon and polyester Unique design and construction achieves high impact resistance and long life with protection against all weather conditions Includes predrilled, countersunk mounting holes for easy installation Drilled to accept 3/4 in. anchor bolts Anchor bolts are easily installed through existing holes in dock"