タイトルまたは説明

1. Material:             
    Pulley:Nylon,POM,Copper,Iron with Needle or Bearing.            
    House(base):Zinc,Steel,Plastic,Aluminum,Stainless Steel.            
2. Color:Choice by the customers like            
3. Feature:            
    Easier : More user-friendly design, simple installation, easy to use and replacement.            
    Safer : Rounded Edges Provides Added Safety and Eliminates Insulation Damage            
    Stronger :The use of imported high-tech materials, pressure testing more than *0,**0 times more durable.            
4. Application Scope:Aluminum or plastic sliding doors and windows