DocKorner Small (1 pc/pk), 5.5" Putty, Foam, Interlok The ultimate in protection systems. No need for fenders any more! This revolutionary new design incorporates a soft expanded polypropylene core surronded by integral skin foam. this creat4es the softest but most durable bumper you can treat your board to. A marine plywood backer also molded in allows strong secure mounting. Unique male and female sockets at the ends make joining the pieces a snap for a seamless look. End caps and corners complete you system for a professional looking job. The U.V. Stabilized classic grey color will enhance the look of your dock and is always clean looking.