3-Pack Guardian Pool/Spa Filters • Replaces Watkins Hot Springs， Unicel C-6430， Pleatco PWK30， Filbur FC-3915<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Outside Diameter: 5 - 7/8" (5 7/8")</li><li>Length: 10 - 1/2" (10 1/2")</li><li>Top Opening: 1 - 15/16" (1 15/16")</li><li>Bottom Opening: 1 - 15/16" (1 15/16")</li><li>Media Weight - 3 oz.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41JkofnQtML.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41arg-WAfgL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/61Fs9h59SoL.jpg" noproxy>