中文Nasopharyngeal Airway
| Isiokwu. | Udi | Id (mm) | Ogologo (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 |
| Na5015 | 5.0 | 5.0 | 115 |
| Na5125 | 5.5 | 5.5 | 6.5 |
| 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.-8 | 8.-8 | 175 |
| Na85185 | 8.5 | 8.5 | 185 |
| Na90190 | 9.0 | 9.0 | 190 |
