Specification

Product Description

1. Maximum load bearing is 30 kg/pair.

2. Many options for nylon roller,please give clean indication of parameter of the rail shape and angle when place the order.

The Maintainance of Rollers

1.The rollers need to be checked and maintained in a certain period,the bottom guide matched with  roller should be clean 

and without sand,cement,dust and the other hard mess and corrosion,because these will let the doors and windows operated

 unsmoothly,and damage the rollers.