... 1.Material:Nylon&steel for the roller 2. shaft 11mm on roller 3.Used as garage door hardware 4.ISO Garage ... and industrial door hardware..Material: Steel and Nylon for the roller.Nylon,2" , shaft 11 mm, L=118 mmNylon,2" , shaft ... bending machine, CNC cutting machine, 5~250 tons punching machines, welding machine, polish machines...Processed materialstainless steel, copper, carbon steel (according to ...