2pc Replacement Activated Carbon Filter Pack for XL300 Fume ExtractorsXL 300 REPLACEMENT FILTERS: This 2 piece activated carbon filter set is the exact replacement set for OMTech's industrial strength series XL 300 fume extractors; for optimal filtration, choose only original OMTech filters for your machine! HIGH EFFICIENCY: Each of the 15x11x2 inch air purifier box filter is capable of clearing 99. 9% of unpleasant odors and harmful fumes including formaldehyde, benzene, and other chemicals, keeping your air quality up