The Dock Edge DocKushion HD is 20% thicker than the Large or Small DocKushion. The new inside DocKorner HD makes the DocKushion HD ideal for heavier dock applications. The DocKushion is ultimate in protection systems. No need for fenders any more. This revolutionary design incorporates a soft expanded foam core surrounded by UV-stabilized integral polyurethane skin foam. This creates the softest but most durable bumper you can treat your boat to. A molded-in backer allows strong secure mounting. Unique male and female sockets at the ends make joining the pieces a snap for a seamless look.• Ideal for heavier dock applications• 20% thicker than regular DocKushion• New inside corner for added protection• Measures 6-3/8"L x 6-3/8"L x 4"H x 2-7/16" thick Soft expanded foam core surrounded by UV-stabilized integral polyurethane skin Softest, most durable bumper for your boat Measures 6-3/8""L x 6-3/8""L x 4""H x 2-7/16"" thick | Dock Edge DocKushion HD 6-3/8" DocKorner Inside