These large, durable bumpers add an attractive and functionally rugged cushion to the leg pipes of your docking system. Each measures 18 (45.7cm) tall with a diameter of 5 (12.7cm). Each torpedo bumper also includes a molded-in air valve for easy inflation or deflation as desired. When placed over dock leg pipes and mounting brackets, they prevent damage to your craft from protruding bolts. Designed to fit pipe up to 2 (5.1cm) O.D.