For use with 100mm / 4" ducting. Used for passive ventilation, air intakes or with in-line fans.
Airvent 404147 Round Ceiling Diffuser Vent Grille 100mm - Polished Chrome
ABS Round Ceiling Air Vent Diffuser White Recessed Design 75mm 100mm Duct Fit
4 Inch Round Ceiling Diffuser ABS Vent Cover with Removable Dust Mesh Screen
