DetailsPentek QC10-CBRR #155785 Replacement Quick Change Carbon Block Water Filter. O.5 micron. Treats Lead, Cysts, Lindane, Atrazine, Chlorine, Sediment, Taste and Odor reduction water filter. 500 Gallons. Fits IC-750, SY-750s, RV-750, IC-1000, SY-1000, SY-1000s & RV1000. Upgrade to a sub micron carbon block in place of the Culligan IC-1000 replacement water filter.