Faucet Parts USA's (pack of 2) alternative to the ROHL Perrin & Rowe FRX02/HRF-1000/FR9455 are fully compatible replacements to fit the U.1812 and Arolla HRK-2000 filters systems. Made in the USA of US and Imported Parts they are Certified by NSF International against NSF/ANSI Standard 42. Our replacement water filter cartridge is designed to provide broad spectrum water filtration. Two key technologies are employed in the construction of our alternative to the FRX02 filter cartridge. There is an outer shell of sub-micron porous ceramic enclosing a section of carbon block. Used in combination, these two highly efficient filter media provide effective water filtration across a wide range of possible drinking water contaminants. How does this compare to the genuine ROHL Perrin & Rowe FRX02/HRF-1000/FR9455 filter? The Faucet Parts USA filter is designed to match the performance of the genuine filter and is certified by NSF International against their NSF/ANSI Standards 42, so you rest assured that the filter is high quality. How do we manage to offer our alternative to the ROHL Perrin & Rowe FRX02 at such a competitive price? Because there is no middleman involved. Unlike the ROHL filter cartridge, which is imported from Switzerland into the UK, and then from the UK into the USA (with various businesses all adding in margin along the route), our filters are shipped factory direct, enabling us to keep costs down to a minimum and pass on that saving to our customers. What systems is this filter cartridge suitable for? This is a suitable replacement filter for the U.1812 and Arolla HRK-2000 filters systems. It is also suitable for use with the Country Kitchen filter faucets A1435 and A1635. (Please note this is a compatible spare part. This filter is not sourced by or sponsored by ROHL or Perrin & Rowe. The manufacturer's name has been used for reference purposes only. Faucet Parts USA is an independent brand.)