FPTH series guide rollers use a thermoplastic polyurethane tread which is cast directly onto a nylon wheel centre, in contrast to FPU series wheels. With a hardness of 92° Shore A, the tread forms a chemically bonded and irreversible connection with the wheel centre which is cast directly onto the sealed ball bearing. The wheels are also hydrolysis-resistant, making them suitable for equipment and machinery used outside in wet areas, such as cranes, conveyor belt systems and lifts.