Sliding roller Steel frame with ball bearing Aluminium wheel or Nylon wheel for option Used for aluminium doors and windows Wheels, Door and window rollers, sliding rollerSpecificaition:1. Sliding roller;2. Steel frame;3. Aluminium wheel or Nylon wheel for option;4. Real bearing, running smoothly, no noise;5. Heavy loading capacity;6. 200 pcs/CTN.We make notch for the screw, do not leave We are ...