black rubber locking caster wheels 1.material:steel,rubber caster 2.total brake,roller bearings 3.capacity:50-120kgs black rubber locking caster wheelsmaterial:rubber wheel,steel fork and plateplate and branket thickness:2-3mmzinc plated finish to resist bruise ,corrosion and dent etc.suggest to use for industrial equipments,platform hand trolley,tool carts. Item numberplate finishwheel diameter( ...