Replacement Filters for the Clearsource Ultra Mini RV Water Filter System include one 5.0-micron rust filter, one 0.5-micron carbon block filter cartridge with high-density activated coconut shell carbon, and one VirusGuard filter.5.0-Micron Rust Filter• Radial structure technology• Reduces iron and rust• Reduces sediment0.5-Micron Filter• Coconut shell carbon block technology• Reduces bacteria• Reduces cysts like Giardia• Reduces VOCs, insecticides, pesticides, solvents, and chloramines• Improves taste and smellVirusGuard Filter• NASA technology• Reduces bacteria• Reduces cysts like Giardia• Reduces e. coli• Reduces viruses• Reduces heavy metals, VOCs, insecticides, pesticides, solvents, and chloramines 0.5-micron filter with coconut shell carbon block technology VirusGuard filter reduces bacteria, cysts, e. coli, & viruses | Clearsource Ultra Mini RV Water Filter System Replacement Filters