Filtration efficiency(Test by weighing dust).Efficiency rate:G1-4. Thickness:4inches(95mm),2inches*44mm),1inch(22mm);

Introduction: The prefilter can catch the diameter of dust up to 5um. The structure is portable, the metal frame can be used repeatedly. Regarding the galvanized steel frame, even if it is used in bad conditions, it still strong and durable. Characteristic: 1.Low resistance and strong air velocity. 2.It is used repeatedly and replaced easily. 3.Suitable for pre-filtration for air condition system and high level filtration device. 4.The highest temperature is 80C the maximal relative humidity is 90%. 5.Efficiency: G1, G2, G3, G4 (EN779) 6.Material of filter: no-woven fabric 7. Frame of filter: paper frame

8. Customized design is available.inner packing: Paper carton

outer packing: Plywood carton

Pleat Prefilter with Carboard Frame