| Model | Configure |
|---|---|
| PSP-20 | SP20 Female+PP20 Male Can connector 8mm outer diameter，5-5.5mm the inside diameter of trachea |
| PSP-30 | SP30 Female+PP30 Male Can connector 10mm outer diameter，6.5mm the inside diameter of trachea |
| PSP-40 | SP40 Female+PP40 Male Can connector 12mm outer diameter，8mm the inside diameter of trachea |
