The 3M CS-52 Bosch 640565 Replacement Filter fits into the CS-452 filtration systems and is also a direct replacement for Bosch refrigerator filters with the SQC cap. The Cuno 3M 55866-05 filter is an economical way to provide maximum equipment protection and consistent water quality for low volume cold cup beverage applications. The 3M CS-52 features a 5 micron carbon block that reduces sediment, chlorine, taste, and odor. Features: 1,500 Gallon Capacity. The 3M CS-52 Replacement Filter Cartridges have a 1,500 gallon or 6 month capacity at 0.5 gpm. Sanitary Quick Connect (SQC). The 3M CS-52 Replacement Filter features SQC to securely install and maintain the CS-52. NSF Certified This filter has been independently tested and certified against NSF/ANSI Standard 42 for reduction claims. This Filter Reduces: Chlorine Taste Odor Sediment The CS-52 filter cartridge replaces these filter part numbers: Bosch 640565, B20CS5, B20CS8, B20CSC81SNS, B20CS81SNW, B20CS81SNB, B20CS51SNS, B20CS51SNI, B20CS51SNSB, B20CS50SN, B20CS80SN, B20CSS0SN, B20CS50SNB-01, B20CS50SNB 01, B20CS50SNB01 Aqua Pure AP3961137, 1257074 3M/Cuno OCS 5553629, 55536-29, 55866-05, 55866-06, CS-51, CS-52, EVOLFLTR10, 700200002518, CS-452, CS-450, OCS CS52, CS-562, CS-512, CS-532, CS-522, CS-451 How to change this filter.