Intex Type A Filter Cartridge for Pools-4 Pack<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Intex® Filter Cartridges Type- A</li><li>Easy to clean dacron filter material</li><li>Replace Filter Cartridge Every Two Weeks</li><li>Diameter measures 4-1/4"， Length measures 7-15/16"， Top hole measures 2"， Bottom hole measures 2"</li><li>Compatible Filter Pumps: 28603，28604，28635，28636，28637，28638，28673，28674 Models 02， 03R， 604， 12R， 22R， 637， 638， 635 and 636</li></ul></div><img src="http://ecx.images-amazon.com/images/I/515JooP5DtL.jpg" noproxy>