Pentair 178655 Cartridge Replacement Quad 80 Pool and Spa D.E. Filter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Cartridge replacement</li><li>Straight， sharp and evenly spaced pleats for efficient dirt holding and capturing</li><li>Durable polyurethane end caps for strength and proper sealing in filter tank</li><li>Re-enforced center cores with a PVC center core for support</li><li>Evenly spaced holes in center core for even distribution of water flow through the cleaning cartridge; measures 6-1/4-inch length by 27-1/4-inch height by 6-1/4-inch width</li></ul></div><img src="http://ecx.images-amazon.com/images/I/3130DLezr-L.jpg" noproxy>