Johnson Level &amp; Tool 183 18-Inch Standard Aluminum Level - 3 vial<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Aluminum I-beam frame</li><li>360 degree reading vials</li><li>Quik-Change replaceable plastic covers</li><li>V-grooved edge</li></ul></div><img src="http://ecx.images-amazon.com/images/I/21DEYBDWJEL.jpg" noproxy>