Sunpentown 2011A-CBN Carbon Cartridge for T1-2011A Type: Water Filter Features: With the ultraviolet radiation between 240 through 290 nanometer Uvc penetrates the outer structure of biological contaminants and alters their dna molecule to destroy and prevent replication Uvc technology used Does not alter the taste, odor or ph value of the water. Uv sterilizer with 99.99% efficiency