Ducting

Kair Elbow Bend Adaptor 110mm x 54mm to 100mm - 4 inch Rectangular to Round 90 Degree Bend - Female

Kair Elbow Bend Adaptor 110mm x 54mm to 100mm - 4 inch Rectangular to Round 90 Degree Bend Adapter - Male

Verplas 125mm Threaded Connector Male

Plastic Circular 90 Degree Bend - 100mm

Flanged Spigot Without Radius (Safe) 100mm Galvanised

Kair Threaded Connector 125mm - 5 inch for Joining Flexible Hose to Round Ducting Fittings

Flat Plastic Ducting to Round Angled Transformer 110x54 - 100mm