Pocket filter F8 Al-zinc frame and non-woven filter material Efficiency:95% ... working life. Material and operating conditions: Grade/typeF5,F6,F7,F8,F9 Pockets (6 /8)FrameAluminum alloy plated ZincMediaSynthetic fiber/ non ... . Factory pictures:Certificates ISO and SGS: Double-deck Pocket filter F8 for the air conditioning system