White Metal Air Vent Grille 150mm x 150mm with Shutter Flat Louvre Duct Cover

100-150 mm (adjustable) White Round Air Vent Grille Adjustable Shutter Duct Pipe

170 mm x 170 mm White Air Vent Grille for 100 mm Round Duct Hose Pipe Connection

Blauberg Round Circular Inline Ventilation Duct Back Draught Shutter - 100mm 4"

204mm x 60mm 45 Bend Horizontal Rectangular Duct

AirTech-UK Gravity Grille White 155mm External with 100mm - 4 inch Round Rear Spigot and Not-Return Shutters Ducting Air Vent

204mm x 60mm 90 Bend Horizontal Rectangular Duct

Blauberg Round Circular Inline Ventilation Duct Back Draught Shutter - 125mm 5"

20 x Universal U Bolt Clamp/Heavy Duty Exhaust Clamps/TV Sky Aerial Pipe 67mm

10 x Universal U Bolt Clamps/Heavy Duty Exhaust Clamp/TV Sky Aerial Pipe (100mm)

Przybysz 100mm Duct 150x150mm Grille Cover Gravity Shutter Ventilation

170 mm x 170 mm Brown Air Vent Grille for 100 mm Round Duct Hose Pipe Connection

Blauberg Round Circular Inline Ventilation Duct Back Draught Shutter - 200mm 8"

adjustable air vent with pull cord for 80mm-160mm round duct

204mm x 60mm 45 Bend Vertical Rectangular Duct

125mm (5") Round Ducting Connector with Damper (inline backdraft shutter)

Blauberg Round Circular Inline Ventilation Duct Back Draught Shutter - 150mm 6"

170 mm x 170 mm Silver Matt Air Vent Grille for 100 mm Round Duct Hose Pipe Connection

204mm x 60mm Tee Piece Rectangular Duct

White Hooded Extractor Fan Vent Grille Cowl with Back Draught Shutter 4" 100mm