Trolley caster,caster wheel,cart caster 1).PVC trolley caster whith pp core,zinc plated 2).Diameter:75mm.100mm Trolley caster,caster wheel,cart caster 1).PVC trolley caster whith pp core,zinc plated2).Diameter:75mm.100mm3).Loading capacity:30kg.60kg4).Color:Black ,orange,blue,red