Ducting Gravity Flap 125mm / 5" Cowl Ventilation Air Vent

White Gravity Flap Air Vent Grille 190mm x 190mm / 100mm

Stainless Steel 150mm 6" Gravity Flap Vent. Perfect for intermittent fans.

Stainless Steel 100mm 4" Non-Return Flap Extract Vent. Perfect for cooker hoods

VENTS NAZAIR Chrome 4-Inch Designer Bathroom Fan with Timer - Silent Luxury Extractor (100mm)

VENTS NAZAIR Platinum 4 inch Designer Bathroom Axial Fan with Timer 100 mm Silver-white

VENTS-CRYSTALIS 100 BLACK T 4 inch 100 mm Extractor Fan with Timer-5056194045155

White Gravity Grille 100 mm / 4" External Ducting Air Vent with Round Spigot and Non-Return Gravity Shutters for Extractor Fans

Vents 100mm Extractor Fan with Ventilation Grille Bathroom Ventilator Air Exhaust

Graphite Duct Gravity Flap 190mm x 190mm / 100mm Air Vent Grille

SPARES2GO Grease Filter Extractor Vent Fan Metal Mesh for Cooker Hood 305 x 267mm

Gravity Flaps Ducting 5" / 125mm Wall Ventilation Air Vent

Stainless Steel 100mm 4" Gravity Flap Vent. Perfect for intermittent fans