In-line portable water filter. Rated to filter up to 50 gallons of water. Removes greater than 99.9% of Cryptospordium and Giardia. Activated Coconut Shell Carbon Reduces waterborne chemicals, improves taste and eliminates offensive odors. Mirigard Antimicrobial Technology suppresses the growth of bacyteria, algae, fungus, mold and mildew within the filter media. 5.5 Inches long. 1 inch diameter. No longer requires a filter ready drinking tube.