Contour Marker #0720-0016 Wrap-A-Round #179 B Use on pipe diameter: 6 inch to 16 inch Wrap-A-Round Contour Precision Layout & Measuring Tools. Inexpensive tool for marking straight lines around pipe, or for use as a straight edge. Made out of flexible gasket material, with good resistance to heat and cold. The material type and service temperature applications up to 350 degrees F. Material is asbestos free. Printed with a scale in inches, pitch chart, tangent chart and other useful markings, Wrap-A-Rounds feature a metric scale and pitch chart.