Get Ready for the Road Ahead with a smooth and reliable spring-operated door assembly, with the Todco 1" SupeRoller Roll Up Door Nylon Roller. To provide your roll up door with a jam and hassle-free method of opening and closing, this replacement part is crafted with a low-friction nylon design. Manufactured with corrosion and rust-resistant metals for extended use in harsh conditions and humid climates. FleetPride is your First Click in Heavy Duty .