iSpring ORBX2 O-Ring for Big Blue Water Filter Housing (2 Pack)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Fits most standard 10” and 20 inch big blue water filter housings</li><li>Leak proof guarantee， built to last</li><li>Leak proof guarantee， built to last</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31qjch3UnzL.jpg" noproxy>