Part of the standard replacement filter configuration for all variants of AeraMax® Pro AM3 and AM4 Air Purifiers. Commercial grade activated carbon filter which adsorbs a wide range of volatile organic compounds (VOCs) and odours. Includes separate pre-filter to capture larger particulate to help extend life of subsequent filters. 6-month estimated filter life, depending on usage conditions. Pack includes 4 carbon filters and 4 pre-filters.