SENTRY Fenders are an innovative boat bumper solution that quickly attaches to boat cleats and docks. Unlike traditional fenders, they offer protection both above and below the rub rail. SENTRY Fenders have a hanging point that's lower than traditional fenders. This allows SENTRY to hang at an angle that aligns with the contour of your boat's hull, which keeps SENTRY from getting caught on top of the dock. It also looks much better.Fenderse measure 22" tall x 9" wide x 5.5" thick.