The Pentek FloPlus10BB water filter cartridges utilize a revolutionary new technology that significantly enhances the traditional carbon filter product. The Pentek FLOPLUS-10BB is ideal for users looking for a product that offers high flow, low pressure drop, infrequent cartridge changes and cyst-free water. It filters like a 10-micron carbon block with the particulate efficiency of a 0.5-micron cartridge. They reduce 99.95 reduction of Cryptosporidium and Giardia cysts and have outstanding chlorine taste & odor reduction capacity. This water filter has high flow rates and low pressure drop similar to a nominal 10-micron cartridge and is tested and certified by NSF International to NSFANSI Standard 53 for the reduction of Cysts.