L400 L600 L1200 3 types of wheels ,small ,medium,grand,which could up to 400 ,600,1200kgs.USED IN THE SLIDING DOOR,the material is steel,the be coated with zinc
L400 L600 L1200 3 types of wheels ,small ,medium,grand,which could up to 400 ,600,1200kgs.USED IN THE SLIDING DOOR,the material is steel,the be coated with zinc