Kair Round Connector 125mm - 5 inch to Connect Duct Pipe or Flexible Ducting Hose

220mm x 90mm Straight Connector with Damper

100mm Metal In-Line Backdraught Ducting Shutter/Damper ERK100

Kair Connector with Backdraught Shutter 100mm - 4 inch Non-Return Damper Flap to Connect Duct Pipe or Flexible Ducting Hose

National Ventilation 494 Easipipe Straight Pipe Connector with Back Draught Damper 100mm / 4 Inch white

10-Inch Circular Inline Backdraft Damper - Butterfly Action Draft Shutter, 250mm - Airflow Control

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

100mm Round Ducting Straight Connector with Damper

8-Inch Circular Inline Backdraft Damper - Butterfly Action Draft Shutter, 200mm - Airflow Control

4-Inch Circular Inline Backdraft Damper - Butterfly Action Draft Shutter, 100mm - Airflow Control

Kair Connector with Backdraught Shutter 150mm - 6 inch Non-Return Damper Flap to Connect Duct Pipe or Flexible Ducting Hose

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

125mm Round Flexible/Rigid Ducting Straight Connector

110mm x 54mm Straight Connector with Damper

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

Kair Connector with Backdraught Shutter 125mm - 5 inch Non-Return Damper Flap to Connect Duct Pipe or Flexible Ducting Hose

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

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

5-Inch Circular Inline Backdraft Damper - Butterfly Action Draft Shutter, 125mm - Airflow Control

150mm Round Ducting Straight Connector with Damper