Zodiac W13073 O-Ring for 2-Piece Locking Ring Cap Replacement for Select Zodiac Nature2 Cartridge<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>O-ring for 2-piece locking ring cap replacement</li><li>Fits Zodiac Jandy Nature2 professional G Vessel W25904 and Premium M</li></ul></div><img src="http://ecx.images-amazon.com/images/I/411t2%2BlRWOL.jpg" noproxy>