Katadyn Hiker Pro Replacement Cartridge (8014644). Official Katadyn spare-parts listing: replacement cartridge for the Katadyn Hiker Pro filter. Related official spare-parts links on that page also name the Katadyn Hiker filter. Specs from the katadyngroup.com Hiker Pro Replacement Cartridge page. That page does not list micron rating or gallon life.

The drop-in cartridge for a Hiker Pro. Official page does not publish a capacity number; we are not guessing one.