2 pak-filter replaces- PLEATCO PDM25P4 DREAM MAKER GATSBY SPA unicel 4CH-21， HOT TUB CARTRIDGE，filbur FC-0136，<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Handle top</li><li>length 8''</li><li>PTL18p4-4</li><li>1 1/2'' MPT， Male Fine Pipe threaded</li><li>DIAMETER 4 5/8''</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41PAgr8%2B9xL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41qMA28jL1L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41VrVcyNdhL.jpg" noproxy>