CE Smith Bow Bell Trailer Roller Assembly CE Smith Bow Bell is constructed of thermal plasticized rubber making it durable. Helping you get your boat on the trailer on the first go and preventing damage from boat to trailer contact makes this the perfect item for any boater. 29332 Specifications 6 Wide 12 Shaft Fits 3 wide center roller bracket Black TPR 4-12 Diameter 29333 Specifications 8 Wide 12 Shaft Fits 4 wide center roller bracket Black TPR 5-12 Diameter California Residents WARNING Cance