The All Flow range of pulmonary function filters offer a wide selection of different fittings to enable a respiratory professional to accurately obtain spirometry and lung function results. All Flow Filters meet or exceed the highest standards and perform with minimal resistance. The unique port colour variety simplifies use and reduces contamination risk with the anti-bacterial filter.
| Colour | OD/ID | Product Code |
| White | 30/26.3 | 3141260 |
| Red | 43.5/40 | 3141265 |
| Orange | 48.5/45 | 3141263 |
| Medium Blue | 34/30 | 3141262 |
| Medium Green | 33.5/30 | 3141266 |
| Yellow | 28.3/28.7 | 3141264 (for Collins Equipment) |
| Purple | 32.3/29.3 | 3141261 |
