Pleatco PPM50SC-F2M Replacement Cartridge for Pacific Marquis Spas, 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 Made in the USA 12-1/2" x 5-3/16". With handle at top and 2" male thread at bottom.