For use with 100mm / 4" ducting. Used for passive ventilation, air intakes or with in-line fans.
Airvent 404147 Round Ceiling Diffuser Vent Grille - Polished Chrome Effect
Blauberg White Round Ceiling Mounted Vent Grille 6"/150mm - DPR 150
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Ceiling Duct Vent 125mm METAL Round Air Diffuser Supply Extract White Pack Of 8
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White Round Air Diffuser with Adjustable Louvers and Insect Screen Features
