Activated carbon replacement cartridge for 50-100 GPD osmosis systems (such as AMTRA OSMOSIS SYSTEM 190) Replacement cartridges for correct maintenance of the reverse osmosis system: regular replacement improves the quality of the water produced and extends the life of the membrane Suitable for reverse osmosis systems from 50 - 100 GPD Disposable cartridge Ready to use: simply replace the ones supplied with the system, respecting the direction of assembly