Pleatco PCM88-4 Replacement Cartridge for American Quantum Stainless Steel， Quantum RPM， Quantum CM， (4 required)， 1 Cartridge<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Replacement filter for pool and spa cleaning systems</li><li>50% open ABS free flow cores maximize water flow through REEMAY filter media</li><li>Antimicrobial end caps resist chlorine degradation and provide support to filter material for a longer life span</li><li>16-1/2-by-3-by-3-inches</li><li>Made in the USA</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41SyIjMO%2BpL.jpg" noproxy>