... :iron,nylon wheel 2.Finish:plated zinc,chrome plated 3.Thickness:1.0-1.2mm 1.Name: window rollers, sliding window roller,window ... pulley,sliding door roller2.Material: iron, plastic,nylon3.Thickness: 1.0- ... us to inquire more information.We are professional manufacturer of window door hardware accessories (roller, hinge, lock, door clip , ...