Haag Engineering 12/1 Shingle gauge<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>The 1/12 Shingle Gauge estimates the warranty levels of 3-Tab fiberglass asphalt shingles installed after Jan. 2011.</li><li>Based on analyses made by Haag Engineering the thickness correlates to a warranty level</li><li>Scales for both 3-Tab Organic and Laminated shingle varieties</li><li>A great tool important for determining what a comparable replacement shingle might be</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41IB2exGakL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31N1SWdIkRL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/21Tsdjv%2BzZL.jpg" noproxy>