This type of seal is made of a thermoplastic insert made according to the materials shown in the graph below:
![Thermoplastic-Pressure-Temperature-diagram_a](https://bbdsrl.it/wp-content/uploads/2018/03/Thermoplastic-Pressure-Temperature-diagram_a.jpg)
Once inserted in the special groove and worked, the insert can have different shapes. BBD can suggest the best shape due to the customer needs, ideal for successfully test results.
![Tipologie-inserti-termoplastici](https://bbdsrl.it/wp-content/uploads/2018/01/Tipologie-inserti-termoplastici.jpg)