1, The plastic pulley outer ring is produced of plastic materials (POM, PP, PA, nylon), with excellent surface for sliding windows and doors.
2, The inner ring is produced of carbon steel with zinc plated, with excellent anti-rust capacity.
3, The colour of plastic outer ring according to customers' requirement.
4, The roller with long life performance
We manufacture many kind of pulley,rope pulley,metal pulley, Guide bearing,guide wheel bearing.
If you  have any query pls feel free to contact us.