Avg annual consum. pkg for 1405-F. Includes: 1 Box of 20 TEOM Filters (57-007225-0020), 4 Bypass Flow Large In-Line Filter Elements (32-010755), 1 Box of 25 47mm TX40 Filters (10-002387-0025), and 1 TEOM Flow Small In-Line Filter Element (32-010745)