Pleatco PWWPC125B Replacement for Waterway Proclear 125-Square-Foot 2006 and prior, Sta Rite Posi Clear PXC-125, 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 28-1/4-by-4-by-4-inches Made in the USA