250mm fixed length pipe with integrated flue damperA flue damper works like a butterfly valve. The more air that goes in a stove, and the more draw through the flue – the hotter it burns. A damper allows you to reduce the draw through the stove and therefore reduce the heat output. t is not essential unless you have problems controlling your stove APPLICATIONSuitable for gas, oil and solid fuel appliances with temperatures up to 750 degrees C.Stove pipe should only be used as a connecting pipe between your appliance and Flue Liner / Chimney Stack / Twin Wall Flue System.Black stove pipe should NOT be used to pass through ceilings or walls.