75mm white disc valve, adjustable ABS ventilation cover for ceiling or wall mounting, round ventilation grille for exhaust fan, duct fan

Stackable Design: The center of the air outlet is adjustable; rotate it to change the amount of air.

Removable Unit: The white vent cover is removable for easy cleaning.

High-Quality Material: Made of high-quality ABS plastic, the air vent is compact and stable.

Easy Installation: With the reverse loop device, slide the vent cover into the previously opened hole, then rotate it slightly to secure it. Connect the pipes and lock them with hose clamps.

Wide Application: The disc valve can be installed indoors as an air inlet and outdoors as an air outlet. It is compatible with 75mm diameter drain pipes and can be mounted on walls and ceilings.