1.high quality 2.reasonable price 3.heavy loading capacity 4.easy to assembly stem swivel caster is important component of wetop flow pipe system,which commonly used in worktables,carts,racks.there is cast iron rubber wheel,super artificial rubber wheel,PP wheel,phenolicaldehyde wheel,with elastic,low noise when move it.Advantages:1.slide2.duable3.adjustable4.light stem swivel caster with brake