SpectraPure SilicaBuster Super DI Cartridge 33% more removal capacity than our standard Silica- Buster DI cartridge Proprietary High Flow, Low Pressure Drop cartridge produces more gallons per da Highest silica, nitrate, phosphate, and heavy metal removal of any 10" DI cartridge availab For ultra high purity water (18 meg ohm-cm resistivit Highest grade, custom-blended resins used for highest purity and lowest TOC leve