50M12/E1
51M12/E1
| Designation | Item-no. |
| Spare PTFE film, open-pore, for 51M12 | 50M12/E1 |
| Spare PTFE film, open-pore, for 51M13 | 50M13/E1 |
| Spare PTFE film, open-pore, for 51M14 | 50M14/E1 |
| Spare PTFE film, open-pore, for 51M15, 51M17 | 50M15/E1 |
| Spare-PTFE-film, air-permeable, for 51M12 | 51M12/E1 |
| Spare-PTFE-film, air-permeable, for 51M13 | 51M13/E1 |
| Spare-PTFE-film, air-permeable, for 51M14 | 51M14/E1 |
| Spare-PTFE-film, air-permeable, for 51M15, 51M17 | 51M15/E1 |