Our Polyurethane Tyre Cast Iron Centre Swivel Plate Braked Industrial Castors feature a front total stop brake with locks both wheel and swivel. The polyurethane tyre offers good resistance to wear, greases and petroleum by-products. The Polyurethane Tyre Cast Iron Centre Swivel Plate Braked Industrial Castors are ideal for heavy-duty applications such as trolleys, lifting equipment and automatic gates. They are supplied with heavy-duty pressed steel housing with double ball race crown, and ball bearings for smooth motion.