SpectraPure Silicabuster Color Indicating Super Di Cartridge Sediment removal at its finest,Color changes to show remaining capacity and cartridge exhaustion Optimized for post RO or post distillation filtration Enhanced design features graduated sediment removal to trap larger particles near its surface and minute particles in the center Designed for a longer life cycle and greater particulate holding capacity Now with 33% more capacity than our standard SilicaBuster DI cartridge