ACO 100mm 4" Axial Exhaust Fan with Front Shutters - Fits Perfect to a 4" DIA Opening.
High speed : Exhaust fan with safety louvers.
Avoids outside dust & prevent flies.
Air Operated Automatic louver opens & Close when switch on/off.
Specially designed for offices, kitchens & AC Cabins, Toilets, Bathrooms,Small dark room & Laboratories.