说明
Tyre & running tread: 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 centre. Wheel Made of high-quality, impact-resistant nylon. Bearing type: Plain bore: corrosion-resistant. Ball bearing (C): A centrally encapsulated sealed ball beari