... 1.Material:Nylon&steel for the roller 2. shaft 11mm on roller 3.Used as garage door hardware 4.ISO ... and industrial door hardware..Material: Steel and Nylon for the roller.Nylon,2" , shaft 11 mm, L=118 mmNylon,2" , ... requirement)Surface treatmentHot galvanized, polishing, chrome/zinc/nickel plating, powder coating, anodize...Making processStamping, deep drawing,bending, punching, laster cutting, ...