"These molded bumpers are built to endure years of abusive pounding. Material Type Fiber-reinforced rubber, Weather Resistant Yes, Dimensions L x W x H in. 16 x 5 x 2, Mounting Hardware Included No, Product Style Molded bumper. 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"