Selecto 101-390 101-290 Compatible Filters for MF600, MF5/600 and MF 600-2P Systems, KleenWater KWBGS4510 Water Filter KleenWater model KWBGS4510 compatible carbon block replacement cartridge for Selecto Scientific 101-290 and 101-390 4.5 x 10 Inch cartridge provides flow rates up to 4 gallons per minute Change cartridges every 6 months or upon substantial pressure drop Ideal for Fountain Beverage Machine Filtration Removes Taste/Odor/Chlorine & reduces chloramine