FPU series guide rollers are made of a thermoplastic polyurethane tread with a hardness of 98° Shore A cast directly onto the ball bearing. They feature very low rolling resistance and have a high level of chemical resistance to many aggressive substances. The brown tread does not leave any tracks because it is non-marking and non-staining. This series includes wheels with very smaller diameters for use in tight spaces. FPU wheels are used in conveyor systems, guidance systems for gates, lifts and convertible roofs.