Unicel 4CH-949 Replacement Filter Cartridge for 50 Square Foot Rising Dragon， Waterway， Dynasty Spas<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Diameter: 4 15/16-inch; length: 13 1/2-inch</li><li>Top end cap: v-groove semi-circular handle， 0-inch inner diameter; bottom end cap: 2-inch female sae thread， 0-inch inner diameter</li><li>Pleat count: 210; filter media: 3-ounce reemay 2033; filter area: 50 square feet</li><li>Get more efficient filtration and better water clarity with Unicel filters</li><li>Longer time between cleanings; meets oem specifications</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41t9%2B7gspnL.jpg" noproxy>