Tie Down Poly Vinyl Non-Marring Trailer Bow Roller Tie Down Poly Vinyl Rollers are long lasting, will absorb shock, are cut resistant and will not mark or mar your boat. Tie Downs enhanced formula for PVC far outperforms traditional polyurethane products. Tie Downs Poly Vinyl rollers are manufactured to withstand both salt water and freshwater conditions. Features For 12 diameter shafts Lifetime guarantee Made in the USA California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.