Series II - GRN Line. 5 7/8" overall. GRN Line filter provides maximum protection from bacteria, Cryptosporidium and Giardia with up to 800ml/minute flow rate. Connectivity: designed for use with any Frontier Flow Water Bottle (67015 and 67026). Miraguard Antimicrobial Technology: suppresses the growth of bacteria, algae, fungus, mold and mildew within the filter media. GRN Line Bacteria Protection: Bacteria Removal: _ 99.9999%, Cyst Removal: _ 99.9% (Meets or exceeds ANSI/NSF 53). Chlorine, Chemical, Taste and Odor Removal: (Meets or exceeds ANSI/NSF 42). Includes Replacement GRN Line Series II Filter, Filter Adapter with 3/4" Thread and Replacement Frontier Flow Drinking Straw. Filters 100 gal. BPA Free. Iodine Free. Chemical Free. USA Made. Hang packaged.