AO Smith 9007674005 Recess Box for ATO-110， ATO-310， and ATO-510<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Can be used with 110 outdoor non-condensing</li><li>Can be used with 310 outdoor non-condensing</li><li>Can be used with 510 outdoor non-condensing</li></ul></div><img src="http://ecx.images-amazon.com/images/I/310yySrjmZL.jpg" noproxy>