sliding door roller 1.Material:iron,nylon wheel 2 ... Name: window rollers, sliding window roller,window pulley,sliding door roller2.Material: iron, plastic,nylon3.Thickness: 1.0- ... information.We are professional manufacturer of window door hardware accessories (roller, hinge, lock, door clip ,shower hinge,glass connector,furniture hinge ... box4boxes/ctn40*23*1520,000pcs iron sliding door roller (XF-R045)