Pentair 191329 Air Relief Strainer Replacement Star Polymeric/Star Pool and Spa D.E. Filter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Air relief strainer replacement</li><li>Fits Pentair Star Polymeric， Star pool and spa D.E. filter systems</li><li>Measures 1-1/4-inch length by 1-inch height by 1-1/4-inch width</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51prm8wgEGL.jpg" noproxy>