... hanger roller 1.Anti-wear 2.Sliding smoothly 3.Abrasion resistant,high hardness, quiet noises 4.Weighted in balanc Glass door hanger ... Interior heavy wood door/Metal sliding door Advantages of hanger roller1. Importing ball bearing, top-grade lube,anti ... 100000 times of pull and push.Maintenances of hanger roller1. No cleaning by wet cloth, please ... acid-base.Photo of door rollerShowroom Hanger roller