Replacement Activated Carbon Filter for Leitz TruSens Z-1000 Small Odors & VOC Filter Drum, 1 pc. This 3 layer activated carbon pellet filter provides an unprecedented level of protection against unwanted odors in your home. The 3-ply activated carbon filter is specifically designed to combat common cooking and cleaning odors and reduce airborne volatile organic gases (VOCs) such as ammonia, acetone and formaldehyde. It is compatible with the Odors & VOC HEPA filter drum for the Leitz TruSens Z-1000 air purifier (item LEITZ Z-1000EU). Note To maintain the optimal performance of your air purifier, it is recommended to replace the Odors & VOC activated carbon filter every 3 months (depending on the duration of use). Package contents: