1. Colored removable hook rings for easy size identification and fixation
2. Soft inflated cushion for good sealing and patient comfort
| Size | Color Code | Cat. No. |
| Neonate | N/A | A07A010110 |
| Infant | N/A | A07A010210 |
| Child | White | A07A010310 |
| Large Child | N/A | A07A050310 |
| Large Paed | N/A | A07A050410 |
| Small Adult | Green | A07A010410 |
| Adult | Yellow | A07A010510 |
| Large Adult | Red | A07A010610 |
| XLGE Adult | Blue | A07A010710 |
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