The Aqua Pure Replacement Cartridge AP431 in blue is specifically designed for the AP430SS model in a scale inhibition system. Made of metal, this water filter cartridge has a capacity of 10 gallons per minute and measures 7 1/4″ in height (not counting screw-in ends) and 2 1/2″ in width. With contaminant removal focused on scale, this Aqua-Pure cartridge is a reliable choice for maintaining clean and fresh water in your kitchen or home.