2 PACK Guardian Filter Replaces: Unicel 4CH-19，Pleatco PSG13.5 MB， Filbur FC-0122 spa Filter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>diameter 4 3/4''</li><li>Length 5 15/16''</li><li>1 1/2'' MPT Threaded</li><li>Fine pipe thread</li><li>14 sq ft</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51NygYoSYDL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41p-neDrjyL.jpg" noproxy>