Vent Systems 125 mm / 5" Inch (Opening Dimensions) White Soffit Vent Cover - Plastic Round Air Vent Grille - Built-in Mesh Screen - HVAC Register Louver for Bathroom, Home, Kitchen

Manrose Cowl Vent White 125mm - Screwfix

AirTech-UK Cowl Gravity Flap Wall | Non-Return Valve Cowl Duct Cover Air Vent White-125mm