Pleatco PLAS35 Replacement Cartridge for LA Spas Replacement For Bag Filter, 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 8-9/16-by-3-inches MPT with handle Made in the USA