The Omnifilter 1750R-S6-S06 is the correct replacement filter cartridge for the following systems:
The Omnifilter 1750R Replacement Filter Cartridge is a quick change cartridge for the Omnifilter US1750 undersink water filtration system. The US1750 filter features a 0.5 micron rating for the reduction of sediment & rust particles, chlorine taste & odor, cryptosporidium & giardia cysts, and lead & mercury. This US1750 replacement cartridge provides healthy, great tasting water for your home and is easy to install/replace with no mess. This undersink water filter has a capacity of 6 months.
Omnifilter 1750R Replacement Filter Cartridge specifications: