Restore flow rates in your HyperFlow Microfilter with fresh, new Hollow Fiber media. Filters up to 1000 liters. Results will vary depending on conditions. Specs Weight (Standard): .8 oz Weight (Metric): 0.02 kg Width (Standard): 1 in Width (Metric): 2.54 cm Length (Standard): 4.9 in Length (Metric): 12.5 cm Filter media: Hollow fiber Cartridge life: ~1000 liters Country of Origin: Made in the U.S.A. of U.S. and Imported Materials Cartridge housing: ABC / PC blend