SP – Extra Soft Thermoplastic Rubber. Hardness: 65 Shore A. (-10ºC to + 50ºC). Injected recyclable thermoplastic extra soft rubber tread and polypropylene copolymer wheel center. Its advantages are the extremely low noise level and vibration reduction. Indicated for light load handling, they offer an excellent floor protection and regular resistance to impacts and chemicals. Nominal working speed is up to 4km/h.
B – Molded Rubber. Hardness: 80 Shore A. (-20ºC to + 70ºC). Produced with molded vulcanized rubber tread over a grey cast iron wheel center. They roll softly with a low noise level, absorb shocks and vibrations. They are resistant to abrasion and chemicals. They can be used at a speed of up to 20km/h when mounted with ball bearings.