Flue pipes are made of steel sheet with 0.5mm thickness. There are two versions: dyed with color for 600C temperature based on silicone resin with a shade of anthracite which are used for fire places in households and with enameling in three basic colors: white, brown and black for various cookers od solid fuel.

The flue pipe called radiator is a product which provides fuel saving and achieve bigger heat efficiency in the room where is used. It can be placed on the space of 1m flue pipe, and the radiation of the heat in the room will increase up to 30%.