Compatible with the Katadyn AC BeFree model. Filters up to 1000 liters, depending on water quality. Easy to install and clean, perfect for long-term use and convenience. Ideal for hiking, camping, travel, or emergency preparedness. Keep your Katadyn AC BeFree water filter performing at its best with these high-quality replacement items. Specifically designed for the AC BeFree, components that help maintain optimal filtration performance and water quality during all your outdoor adventures. EZ-Clean Membrane: Features a high-flow hollow fiber membrane that filters out bacteria and protozoa. Thanks to its design, it can be easily cleaned in seconds - no tools required - by simply shaking or swishing in water.