The TDF flange is one of two universal flange manufacturing systems in the world. Suitable for small size duct connection, good sealing, and low cost. Equipped with 16 pairs of forming rollers, 2 forming stations. Flange height 34mm. Standard station is used for manufacturing TDF flange, auxiliary station is used for making clip, that is, forming flange and forming clip at the same time, to achieve one machine double energy. Unique structure, nice appearance, can be taken to the construction site for use.