Water Factory 47-55708CM CoolerMate Carbon Block Replacement Water Filter by 3M Purification has been replaced by the 47-55708G2. If you order the 47-55708CM you will receive the 47-55708G2. Carbon block water filters cartridges. High absorption activated replacement carbon block cartridge for high capacity chlorine reduction. Provides high flow stream of drinking water through unique radial flow cartridge design. For use as second cartridge in CM 2 CTO products and as postfilter in CMRO-3TFC systems.