1. It can be divided into standard type and rotary type according to the base structure. A. Standard type: bis space angle of this type can not be rotated, the two heads can be regulated from 0 to 185°randomly, but please consider the material factor. B. Rotary type: this type can make bis space rotation, and the two heads can be regulated form 0 to 90°randomly; 2. With PLC control and text display, it has advantages of convenient operation and simplicity of maintenance; 3. Multi functions like manual, automatic, half cycle, complete cycle and so on; 4. You can choose 1 or 2 pieces above every time for operation according to the outside diameter of material; 5. The two heads can be operated respectively or synchronously, to ensure the distance and parallel; 6. It can process the pipes synchronously even if they have different bend angles, with a wide application range.