中文Llwybr Awyr Nasopharyngeal
| ErthyglRhif. | Math | ID(mm) | Hyd(mm) |
| NA2560 | 2.5 | 2.5 | 60 |
| NA3072 | 3.0 | 3.0 | 72 |
| NA3585 | 3.5 | 3.5 | 85 |
| NA40105 | 4.0 | 4.0 | 105 |
| NA45110 | 4.5 | 4.5 | 110 |
| NA50115 | 5.0 | 5.0 | 115 |
| NA55125 | 5.5 | 5.5 | 125 |
| NA60135 | 6.0 | 6.0 | 135 |
| NA65145 | 6.5 | 6.5 | 145 |
| NA70150 | 7.0 | 7.0 | 150 |
| NA75160 | 7.5 | 7.5 | 160 |
| NA80175 | 8.0 | 8.0 | 175 |
| NA85185 | 8.5 | 8.5 | 185 |
| NA90190 | 9.0 | 9.0 | 190 |
