Pentair 152509 8-1/2-Inch Square Ring Replacement Pool/Spa Filter and Pump<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Square ring replacement</li><li>Fits Pentair Triton C-3 pool and spa commercial filter models TR100C， TR140C</li><li>Also fits Pentair Waterfall， Challenger high flow pool and spa pumps</li><li>Measures 8-1/2-inch</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41gAjJg6I3L.jpg" noproxy>