XIIW 4'' 100mm Bathroom Extractor Fan with Humidity Sensor and Timer Overrun Delay, Silent Bathroom Fan with Backflow Flap, 95 m³/h, 12 Watt / 34 dB for Bathroom, Toilet, Kitchen - White

XIIW Bathroom Fan 100 mm with Humidity Sensor Extractor Fan Adjustable Overrun Time with Timing Wall Fan Silent with Backflow Flap 95 m³/h, 12 Watt / 34 dB for Bathroom, Toilet, Kitchen

Awenta ABS Grate Ventilation Louvre Cover (White,100mm)

MKK Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White