Washable Pleated Pre Panel Filter HEPA Filter with G3/G4/M5 (EN779) Air Filter for Hospital/Electronics and Cleanroom - China Replaceable High Efficiency Ceiling Module, HVAC Systems in Pharmaceuticals | Made-in-China.com
Partition filter with a metal frame G4 EU4 ISO COARSE 70% 142 x 509 x 48 mm
EN 779 - Ulpatek
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Primary Efficiency Washable G4 Panel Air Filter for Ahu Pre Filter - China Air Filter, Washable Air Filter | Made-in-China.com
Pre Filter Mat EN779:2012 Class G2/G3/G4 – Siam Filter Solutions Co., Ltd.
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Air Filter Mat G2-G3-G4 (EU4) 1 m x 2 m, 10 to 20 mm Selectable Filter Mat Filter Fleece (EN 779) (G4) : Amazon.co.uk: DIY & Tools
Metal Framed Pleated Panel Filter class G4 for air filtration