... negative ion,anti-aging,etc. Some details about this filter net :Normal Specifications:PPKG15*13, 12*13, 11*10, 17* ... efficacy.3.Safe & Green: Light-catalytic has been widely used in construction industry, household appliances, etc. The product is safety ... nonpoisonous.4.Application: All kinds of split unit air conditioning, window air conditioning, mobile air conditioning, air purifiers, etc. Light- ...