2 Pack - Cartridge Filter for Craftsman 9-17816 17816 Vacuum Filter General Purpose Wet Dry Air Filter Wet Dry Vac fit 5 Gallon and Larger Vacuum Cleaner Fit Current Vacuums 9-17784, 9-17761, 9-17066, 9-17741, 9-17742, 9-17765, and 9-17762. Will also fit older vacuums: 6 gallon manufactured since 1992; 8, 12, 16, 32 gallons since 1988 and 9-17923, 9-17932, 9-17935, and 9-17937 The 17816 replacement filter for craftsman is made with premium quality pleated paper,Excellent for cleaning up concrete and drywall dust, fine ash, sawdust/wood chips, job site debris and car or truck dirt,etc. It is recommended to replace the filter every 3-6 months according for optimal performance. Package includes: filter x 2.