the ulnar band is strong and not easily deformed Diameter Tape Measure Pocket-sized, flexible, and retractable steel tape measure with both diameter ( OD measurement) and standard integer measurements Application Range: diameter of the measuring tree Easy Read Tape Measure Includes inches and metric measurements down to millimeters on both sides; High contrast, easy to read numbers Measure Around Anything Standard, excellent for measuring trees, branches, or pipe fitting, Manufacturer: uikios