NRP 6pcs Qualitys Replacement Charcoal Water Filters Coffee Water Filter for Keurig Coffee Machine A good quality Charcoal water filter can be removes impurities: chlorine, calcium, bad tastes and odors and helps ensure deliciously fresh home-brewed coffee Compatible with most of KEURIG 1.0 , 2.0 Single Cup Reservoir Brewing Systems. Each Filter Individually Bagged and Sealed to Ensure Brand New Quality for You! Specially Designed for Keurig Coffeemakers, These Set of Charcoal Filter Refills Will Improve Your Health by Improving the Water Quality and Prolonging The Lifespan of Your Machine KEURIG Recommends Changing the Water Filter Every 30 days or 60times Uses, More Often If You Have Hard Water NRP picked & packed all of Charcoal Filters would be a Guarantee of Quality and make sure to Fits on Keurig Brew System