... Loading capacity: 45kg,60kg Wheel diameter: 50mm,75mm caster:Wheel: black hard rubberFork: high grade Q235 steel ... top plate,threaded stem and grip stemFeatures:1.caster: rigid caster, swivel caster2.rubber: excellent anti-abrasion, resist compression, ... corrosion,bruise and dent4.suitable scope: heavy-duty appliance,forklift,factory workshop,industrial trolley,etc. 2010 new light-duty caster