Pocket filter VERSIONS: 2V – 3V – 4V Polypropylene frame Filter media: Glass fiber efficency from M6 to F9 Synthetic with active carbons efficency M5 and F7 Metal pocket filter Galvanised or stainless steel frame VERIONS: 2V – 3V – 4V banks Atex Fully potted Filter media: Glass fiber efficiency from M6 to F9