DockSide Bumpers provide excellent heavy-impact protection as well as outstanding protection to boat gunnels. Made of rugged, air-filled, heavy-walled molded PVC with integral inflation valve. Designed with angled ends to deflect craft. Mounting hardware not included. 11-1/4"L x 11-1/4"L x 6-5/8"H x 7-1/2"D.