Made of heavy pressed high-quality, chromium-nickel stainless steel (Material No. 1.4301/AISI 304). All parts incl. axle material are corrosion-resistant. Bolted wheel axle. Vibration-ground finished. Made of high-quality thermoplastic polyurethane, high operational comfort, low-noise operation, low rolling and swivelling resistance, good floor preservation, very high abrasion resistance, chemically bonded for an inseparable connection to the wheel center.