1.Make of zinc alloy and nylon wheel 2.4pcs roller and sme plastic for one set. 3;it have 70# and 90#

1.Name:window roller2.Material:zinc frame with nylon roller

3.It is design by Euro country.4.bearing good quality,running smoothly5.pvc bag then box packing

6.suitable for all the door and window accessories

70# roller for sliding window and door