| Category | Specification |
|---|---|
| Series | KN |
| Corresponding Standard | N90 |
| Enterprise Code (Grade) | KS-Ⅲ |
| Flow Rate | 85L |
| Testing Requirement | Single Layer / Double Layer |
| Resistance (pa) | ≤60 / ≤130 |
| PFE Efficiency (%) | ≥85 / ≥90 |
| Grammage (g) | 25 |
| Color | White |
| Testing Medium | Sodium Chloride (NaCl) |

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