Electric conduction caster 1.housing:made of pressed steel,zinc plated,double ball bearing swivel head,medium duty version wheel. 2.material:esd rubber 3.diameter of wheel:63mm/75mm/100mm/125mm 4.Load capacity:from 80kg to 120kg 5.matching different fitting:fixed,plate swivel, swivel with brake,threaded stem and threaded with brake. Features:attractive appearance, wear resisting, good loading capacity Usages:furniturecasters, cart, trolley, medical appliance, machine equipment, etc. Available sizes: model numberwheel diameter (mm) wheel width (mm) load capacity (kg) overall height (kg) bracket thickness (mm) top plate thickness (m) mounting size (mm)M11-63-xxx6332801082.53.578*45M11-75-xxx7532901192.53.578*45M11-100-xxx1003211001332.53.578*45M11-125-xxx125321201572.53.578*45* Please contact us if you have any questions about our available sizes. OEM order is welcome. Good quality and reasonable price. Welcome to inquiry!