Rohl Arolla Replacement Filter Unit Only - HRF-1000Rohl Arolla Replacement Filter Unit Only HRF 1000 Replacement filter for the HRK 2000 system, designed to reduce harmful contaminants while improving water taste and quality. Features Replacement filter for HRK 2000 and U. 1812 filter systems Also compatible with Country Kitchen filter faucets A1435 and A1635 Filters to 0. 2 microns for effective contaminant reduction Removes Cryptosporidium parvum, E. Coli, Salmonella, and other bacteria Made of