| Cylindrical chambers | kQQo |
| PTW 23332 rigid | 1.029 |
| PTW 30001/30010 Farmer | 1.031 |
| PTW 31014 PinPoint | 1.026 |
| PTW 34045 Markus | 1.004 |
| Plan parallel chambers | kQQo |
| PTW 34001 Roos | 1.003 |
| PTW 31010 Farmer | 1.003 |