The Katadyn Hiker is the best selling microfilter in the US Outdoor Market. Lightweight and easy to use design is the best choice for all around use. Unique, pleated cartridge design provides fast and easy pumping. Convenient and handy for 1-2 people (e.g. while hiking or trekking). Compatible with hydration bladders. Includes: Prefilter, bottle adapter and carry bag. Dimensions (in) 3 x 6 Diameter (in) 2 ? Output (gal) 1 quart/min Technology AntiClog Technology with 0,2 micron glassfiber, Activated carbon Weight (oz) 11