Renovo Trio Stage 2 (Hollow Fiber) Replacement Cartridge / Personal Water Filter Replacement / Survival Water Filter Compatible ULTRAFILTRATION - This cartridge uses Ultra Filtration (UF) hollow fiber membrane technology that will filter 264 gallons/ 1000 liters making it the perfect personal camping filter. The unmatched straw like tubes measure 0.1 microns will provide the the removal of 99.999% of Bacteria and Protozoa. HIGH FLOW RATES - This Survival Water Filter has a large surface area that enables a high flow rate and will protect you from unwanted contaminates and help you survive. LIGHTWEIGHT - As a personal water filter this camping survival filter is extremely lightweight only weighing 0.1 oz and measures 3.75 x 1.1 SURVIVAL FILTER - This personal water filter is the perfect addition to your pack which will provide survival water as it is the perfect survival filter. COMPATIBLE - This filter is compatible with many other personal water filter systems and is the ultimate survival water filter.