Heavy duty castor, design as fixed castor, housing designed as galvanised welded steel construction with ball bearing in fork head, mounting with screw-on plate. Installed wheel B15, B16, B80, B81, B83, B90, B91, C10, C11 or C81 with ball bearing and tread made of plastic, cast polyamide, elastic rubber, Besothane cast polyurethane, Prothane® cast polyurethane, cast polyurethane or cast iron.