Replacement Filters for the Clearsource Premier Mini RV Water Filter System include one first-stage 5-micron coconut carbon block filter and one second-stage 0.2-micron absolute filter.5.0-Micron Filter• Coconut shell carbon block technology• Reduces sediment• Reduces VOCs, insecticides, pesticides, solvents, and chloramines• Improves taste and smell0.2-Micron Filter• Absolute rating• Hospital grade• Reduces bacteria• Reduces cysts like Giardia• Reduces E. coli 0.2-micron absolute filter reduces bacteria, cysts, & e. coli | Clearsource Premier Mini RV Water Filter System Replacement Filters