Pleatco PIN20 Replacement Cartridge for Intex Easy Set Pool "B" Version, 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 10-1/16-by-2-1/8-by-1-15/16-inches Made in the USA