... roller 1.Material: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 ... information.We are professional manufacturer of window door hardware accessories (roller, hinge, lock, door clip ,shower hinge,glass connector,furniture ...