heavey steel hub PU caster size:6X3" material: steel hub and PU heavey steel hub PU caster size:6X3"material: PU on steelplate thickness: 6mmzinc plated finish for corronsion resistance zerk fitting in swivel race for lubricationhardened racewaypackage: wooden caseWe have 9 years of export experience. We have excellent quality and reasonable price.Please free to ask if there is any question in ...