... Material Option:1.Bearing Material:carbon steel,chrome,stainless steel,iron,copper,ect.2.Roller Material:POM,nylon,glass fiber, ... of rollersApplication:This kind of roller is suitable for shower room,wardrobes,big cabins,sliding doors and windows,etc.Our ... groove ball bearing or carbon steel, bearing steel, stainless steel, non-standard bearing and injection molding roller and dysmorphism parts. Our ...