This Medium Jackson Safety Pipe Marking Tool is used by pipe fitters and welders for measuring and marking straight lines around pipes or to mark a straight edge prior to welding or cutting. The tape comes available in black and is made of a super flexible, heat resistant, gasket material. It’s able to wrap around the circumference of pipes to gauge measurements and marks. The tool has a printed scale in inches, an inch chart, tangent chart, and other markings to help you make straight lines around pipes. The pipe marker tool has a marking scale from 3.88 inches to 6 feet and is designed for 3″ to 10″ pipe diameters.