... as negative ion,anti-aging,etc. Some details about this filter net :Normal Specifications:PPKG15*13, 12*13, 11*10, 17*15 ... Diameter:0.20, 0.18, 0.16, 0.14(mm)Active Ingredient: Light-catalyticOther Characteristics1.Various capabilities: Antibacterial, mildew proof, deodorant ... , mobile air conditioning, air purifiers, etc. Light-Catalytic Antibacterial PP Filter Net