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 high-quality, impact-resistant, highly heat-resistant nylon, very low rolling and swivelling resistance, smooth running performance on even floors, very high abrasion resistance, suitable for autoclaves.