a.Adopt stainless steel pulley to improve load -bearing. b.Width of sash ≥300mm. c.Height of Sash ≤4000mm. d.Max weight of Sash 400kg. e.Adopt barrier free bottom track, flush with the floor and barrier free both come in and go out. f.Stainless steel jam cover cap installed on bottom track to improve durability. g.Speciallzed sill pan guarantees high water tightness. h.Can be made into pocket sliding door,do not take up interior space and improve the utilization to the utmost. i.Multi-sash/rail sliding door can be achieved by splice matching of different rails.