Pentair 154492 2-Inch Bulkhead O-Ring Replacement Pool and Spa Sand Filter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Bulkhead o-ring replacement</li><li>Fits Pentair FNS and Nautilus pool/spa D.E. filters</li><li>Also fits Pentair Triton II pool and spa sand filter models TR100C， TR140C</li><li>Measures 2-inch</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31znrnfiqcL.jpg" noproxy>