Ball caster wheel thread/screw - heavy duty 360 degree moving swivel castor wheel with 50 mm 200kg capacity for office chair wheels,trolley, desk chair - set of 4

impex Thread Ball Caster Wheel - Heavy Duty Thread Type Wheel, Size 50 mm for Office Chair Wheels, Desk Chair, Shopping Trolley, Furniture Equipment and More - Set of 4 Swivel Furniture Caster