Sta-Rite Spring Check Valve Gasket<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>1-3/16"Inside Diameter， 2-1/16"Outside Diameter</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41WDyZ9AhJL.jpg" noproxy>