hanger roller 1.Anti-wear 2.Sliding smoothly 3.Abrasion resistant,high hardness, quiet noises 4.Weighted ... : 120KGMax door thickness:3-5mmUsage: Interior heavy wood door/Metal sliding door Advantages of hanger roller1. Importing ball bearing, top-grade ... lube,anti-wear, sliding smoothly.2. Covered with muti-layer composites, abrasion resistant, high ...