The Shoreline Marine Bow Roller is made of a non-marring polymer blend. It measures 3" x 1/2". Allows boat to roll smoothly on the trailer. Spins freely to reduce drag while launching your boat. Unaffected by oil, gas or salt.
Made for 12'' brackets. Takes the guess work out of centering your boat on the trailer. Embedded grooves to automatically center boat while boat rolls forward. Made of long lasting, non marking polyurethane. 5/8'' shaft diameter.