150mm - 5-3/4" Full-Flexible Rule - mm & Inch Graduations, mm & 1/2mm on One Side; Quick-Reading 10ths & Aircraft Quick-Reading 50ths on Rev.. The Starrett 150mm - 5-3/4" Full-Flexible Steel Rule with Millimeter and Inch Graduation features a satin chrome finish. Graduations include mm and 1/2mm on one side; quick-reading 10ths (.10) and aircraft quick-reading 50ths (.02) on reverse. 150mm (5 3/4"), No. 34 Grad, Full-Flexible reverse.