Ducting Pipe 90 Degree Elbow Hose Ventilation Round Tube Bend Connector (4 inch)

90 Degree 4 Inch / 100mm Plastic Elbow - Bend Connect Ducting Pipe, Duct or Hose - Straight or Flexible - Ventilation Connector Round Joint Tube

Kair Plastic Ducting Pipe 100mm - 4 inch / 1 Metre Long Length - Rigid Straight Duct Channel

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