Adopt Excellent PS engineering plastic with a certain quantity of Anti-aging agent under injection process; Ensure a strong anti-aging function with longer lifespan.

Special design in window door connection part offers a better sealing when close up.

Protection net connection change from button type into bolts & nuts type, which effectively avoid the damage in transportation.

Reset Spring and Pulley support are all made of excellent stainless steel, Lifespan is extended.

Added with special designed pull rod pulley which reduce friction and facilitate installation mostly by holding up pull rod or steel rope.

Light trap can be offered in clients requests to save cost. It’s easy for connection with air inlet by bolts&nuts. Compared with traditional light trap which used in the air inlet, the cost is reduced about 50%.

Air guide plate can be offered in clients requests. Added spring enables air guide plate to adjust it’s angle according to the window door opening angle.