100 TO 315mm cowl has male end so will sit in top off you duct.
Metal Cowl, Ducting, Chinamans Hat 100-500mm, Pizza oven, Ventilation, Flue
Chimney Cowl Ducting Pipe Cover Rain Protector Acid-resistant Woolper
Chimney Cowl Ducting Pipe Cover Rain Protector Flue Liner Cap Duct Pot Woolper
Chimney Flue Liner Metal Reducer Ducting Stainless Steel Pipe Connector Adapter
Galvanised Metal Reducer Ducting Pipe Steel Connector Adaptor Chimney Flue Liner
