2-Stage Faucet-Mount Replacement Water Filter, 2-Pk.2 pack, 2 stage faucet mount basic replacement filter, maxion filter technology for maximum contaminant reduction, certified to reduce over 70 contaminants, including 99% of lead, 92% of agricultural pesticide, 96% of mercury & more, reduce trace levels of pharmaceuticals, fits all pure faucet mount systems, 1 filter provides up to 100 gallons 2 to 3 months of clean water. fits faucet mount skus 210135, 214900, 214901 & 214902,