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Pre Filter Panel Filter Item: Paper (Cardboard) Frame Air Pre Filter Feature: Large Filter Area and Air Flow; Low Initial Resistance; Large Dust Holding Capacity; Economical and Practical. Specification: 01. Apply to Filter dust, pre-filter through air filter program and air conditioning system; 02. Frame: Paper (Cardboard), Aluminium and Galvanized is also available; 03. Media: Synthetic Fiber; 04. Protect Metal Mesh: Aluminium or Galvanized; 05. Efficiecny: EN779 class G2, G3, G4, F5; 06. Average Arrestance: 80%-90% (ASHRAE 52.1-1992); 07. Non-falmmability Standard: F1; 08. Max. Air Flow: 125% of the rated air flow; 09. Temperature resistance: 100 Celsuis Degree; 10. Humidity: 100%; 11. Datas: Dimension(mm)Rated Air Flow(m3/h)Filters MediaInitial PressureEN779595x595x46110Synthenic Fiber30/70G3595x290x4645030/70G3595x595x4615040/80G4595x290x4670040/80G4595x595x4625045/90F5595x290x46100045/90F5 Any Size is available as per requirement; 12. We also accept small order.