Pleatco PWWPC150B Replacement for Waterway Proclean In-Ground Pool Cartridge 150-Square-Foot, 2006 and Prior, Pentair Sta Rite Posi Clear PXC-150 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