Tie Down Hull Saver Roller Bunk Roller Bunks Heavy duty galvanized steel frame provides full hull support. Roller bunks can be adjusted vertically with optional bolster support swivel brackets. These roller bunks can be bolted directly to wooden bunk boards or directly to the trailer frame. Hull Saver rollers will not mark hull bottoms and have a limited lifetime warranty against cutting and fading. Bunk kits do not include mounting hardware. Sold As A Pair Sizes Available 4 Hull Saver Uses 5 se