Welded steel heavy duty swivel castor, Heavy duty wheel with Blickle Extrathane® polyurethane tread, with aluminium wheel centreBracket: Sturdy welded steel construction, with double ball bearing in the swivel head, additionally reinforced by the integration of four specially shaped and hardened bearing seats, swivel head seal with labyrinth design, fitted grease nipple, bolted and secured with a welded very strong central kingpin. Bolted wheel axle. Zinc-plated, blue-passivated, Cr6-free.Wheels: Tyre & running tread: Made of high-quality polyurethane-elastomer Blickle Extrathane®. Color: light brown, Shore: 92° Shore AHigh chemical resistance to many aggressive substances. Operating temperature: -25° C to +70° C, temporarily up to +90° C. At ambient temperatures above +40° C the load capacity is reduced. The indicated load capacity refers to applications without obstacles. Maintenance-free under standard conditions.