Hayward， Sand Master Filter， Top Mount (Clamp Style) Valve to Tank Replacement O'Ring<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>6-3/4" Inner Diameter</li><li>3/16" Cross Section</li><li>GMX600F</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31zLN6Gs2wL.jpg" noproxy>