Mountain Plumbing MT1250XL Mountain Pure Carbon Water Filtration System More efficient and clog resistant - unique filter media created by attaching powdered activated carbon and Lead absorbent material onto a cellulose-free synthetic fiber matrix 99.9% removal - removes 99.9% of particles over 5 microns Anti-microbial - filter incorporates an anti-microbial agent to reduce bacteria Anti-scale - anti-scale media for protection against scale build-up on the faucet and inside of the hot tank 1000 or 1200 gallon capacity lasts 9 months based on average usage