The PTEF needle has a double-threaded polypropylene needle holder and an outer tube precisely pressed with the PTEF lining, which is exposed approximately 3mm from the inside of the stainless steel needle. When using PTEF-lined tips, prevents Cyanopropionate from blocking and damaging the base.
| Gauge | Color | ID(mm) | OD(mm) | 12.7mm(1/2″) | 25.4mm(1″) |
| 20 | Grey | 0.6 | 1.1 | PT 20050 | PT 20100 |
| 25 | Pink | 0.3 | 0.78 | PT 25050 | PT 25100 |
| 27 | Red | 0.2 | 0.55 | PT 27050 | PT 27100 |