Jacuzzi 47-0380-47 Tank Body O-Ring<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Outside Diameter: 11-3/4"</li><li>Inside Diameter: 11-3/8"</li><li>Thickness: 3/16"</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41ZXWhXEQZL.jpg" noproxy>