Made of pressed steel, with double ball bearing in the swivel head, strong central kingpin, ball protection by the special top plate design. The special Blickle dynamic riveting process of the swivel head results in smooth rolling characteristics, increased service life and the swivel head play is set specifically for high temperature applications, with special heat-resistant grease. Bolted wheel axle. Zinc-plated, blue-passivated, Cr6-free. Made of highly heat-resistant silicone rubber, very high operational comfort, low-noise operation, highly elastic, very good floor preservation, high abrasion resistance, characteristics that do not degrade over time, vulcanised on the wheel center.