Ø 100mm / 4 inch Metal Chimney Cowl with Bird Guard - Rain Snow Hat - Exhaust Tube End - Vent Cover/Cap : Amazon.co.uk: DIY & Tools
Rain cap (4 inch) - Twin wall flue : 4 inch (100mm) Twin wall flue Dinak DW
Darco 140-180mm Chimney Flue Pipe Rain Cover Protector Cap Ending Stainless Steel | DIY at B&Q
Ø 100mm 4" Inch Round Roof Vent Cap Galvanised Steel for All Weather Conditions Top Round Exhaust Cap with Rubber for Perfect Insulation Vent Cover : Amazon.co.uk: DIY & Tools
4/6/8 Inch Stove Pipe Chimney Cap Fireplaces Rain Hat Smokeware Zinc Alloy Mushroom-shaped | Fruugo UK