Pleatco PXST100 Replacement for Hayward X-Stream CC100, 1 Cartridge Replacement filter for pool and spa cleaning systems 50% open ABS free flow cores maximize water flow through REEMAY filter media Antimicrobial end caps resist chlorine degradation and provide support to filter material for a longer life span 17-3/8-by-4-by-4-inches Made in the USA Pleatco PXST100 100 Square. Feet. Filter Cartridge for X-Stream CC100