This is a genuine DeLonghi replacement part. This window exhaust vent is most often used with air conditioners. It attaches to the exhaust hose tube and helps lead hot air out of the air conditioner through a window, the exhaust hose is sold separately. If you are not properly leading the hot air out of the hose through a window it will b...Read moree impossible for the appliance to effectively cool the room. The window vent is made of plastic.