sunny castors
Polypropylene-Weak load capacity                     -Easy brittle and ageing  Polyamide-Well load capacity                 -Unbreakable and maintenance-free Polyurethane-High load capacity                    -Robust and resistant to rubbing                     -Quiet operation  Thermoplastic elastomer-High load capacity                                     -Extreme resisting to rubbing                                    -Quiet operation                                    -Excellent running and serving comfort 

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