Wrap-A-Round Contour Precision Layout & Measuring Tools. Inexpensive tool for marking straight lines around pipe, of for use as a straight edge. Made out of flexible gasket material, with good resistance to heat and cold. All Wrap-A-Rounds are available in two colours. These designate material type and service temperature applications up to 550oF. B(black) material has a service temperature of up to 350oF. Both material types are asbestos free. Extra small and special order sizes are unmarked. All other sizes are printed with a scale in inches, pitch chart, tangent chart and other useful markings, Wrap-A-Rounds in 3.88" and 5.00" feature a metric scale and pitch chart.