Much more than just an ordinary raparound! Made of rugged, heat-resistant material Can be used as a straight edge, square and scale. Precision cutting gives a smooth, clean, long-lasting edge for marking. Decimal equivalents (R-12 & R-18 Only) It has layouts for 3, 4, 5, and 6 piece 90 degree elbows (R-12 & R-18 Only) Protractor and other useful information for welders and fitters. (R-12 & R-18 Only) All printing in dense black. (R-12 & R-18 Only) Big Inch 7" Wide 90" Length. (No-Print)