... or anti-virus Glass microfiber filter media, comprised primarily of glass microfibers, is produced with a wet laid process which ... -Temperature Industrial, HVAC System, Paint Spray Booth, Prefiltration for HEPA Systems, etc. Specification:ClassificationGradeEfficiency(≥%)Basic Weight (+-5g/m2)Thickness ... . Dimensions and packing conditions can be selected. HEPA air filter paper/mini-pleat filters paper