204mm x 60mm to 100mm Horizontal Adaptor

204mm x 60mm to 100mm Rectangular to Round Adapter

204mm x 60mm 150mm Double Airbrick Adaptor

110mm x 54mm to 204mm x 60mm Rectangular White Airbrick Adaptor

Compression Straight Adaptor - 22mm X 3/4"

68mm Downpipe X 110mm Pipe Adaptor | Drainage Shop

204mm x 60mm to 125mm Horizontal Adaptor

Coupling Adaptor 110-122mm to 48-56mm Flexible Rubber Reducer

Pipe Adaptor Coupling 110mm to 50mm Terracotta uPVC Reducer Fitting

204mm x 60mm to 110mm x 54mm Reducer / Adapter