Pleatco PPC50 Replacement Cartridge for Sta-Rite Posi-clean FCP50, TXC50, TXC50B, FCP50B, FCP100, TXC 100, 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 19-7/16-by-3-by-3-inches Made in the USA