DESIGNED FOR COMPATIBLE SYSTEMS: Replacement filter cartridge intended for systems requiring a CB6-style filter. DIMENSION MATCH REQUIRED: Length, diameter, and end-cap style must match your existing filter. CARBON BLOCK FILTRATION: Helps reduce common aesthetic water concerns when used in the correct system. ROUTINE MAINTENANCE PART: Replace at intervals recommended by your system manufacturer. IMPORTANT FIT NOTICE: This filter is not interchangeable with similar-looking cartridges. Neo-Pure CB6 replacement filters are designed to meet consistent specifications for compatible filtration systems. Confirm system requirements prior to ordering.