cast iron swivel polyurethane heavy duty caster zinc plated finish to resist corrosion,bruise and dent. function:suggest to use for most enviroment place like workshop,warehouses,industrial equipments,restaurents and other heavy duty equipments. Item numberwheel diameter(mm)wheel width(mm)overall height(mm)bracket finishbearingcapacity(kgs)N86010010050145zinc plated finishball bearing260N86012512550170zinc plated finishball bearing330N86015015050190zinc plated finishball bearing370N86020020050240zinc plated finishball bearing400