Avg annual consum. pkg for 1405-DF. Includes: 2 Boxes of 20 TEOM Filters (57-007225-0020), 4 Bypass Flow Large In-Line Filter Elements (32-010755), 2 Boxes of 25 47mm TX40 Filters (10-002387-0025), and 2 TEOM Flow Small In-Line Filter Elements (32-010745)