CE Smith 29570 Rubber Boat Trailer Keel Roller End Cap 3-12 The CE Smith replacement end cap is constructed of black natural rubber and is a direct replacement for original equipment on many trailers. 3-12 Diameter 1-516 Wide 58 Shaft California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google Product Type Trailer Rollers Wiser Yes Material Rubber Product MPN 29600 Product UPC 768296002503 Fast Ship In Stock Ships Today