Pleatco PA12 Replacement Cartridge for Hayward C-120, MicroStar-Clear (In-Line), 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 32-7/8-by-3-by-3-inches Made in the USA