General Tools & Instruments 300ME 6-Inch Flex Precision Stainless Steel Rule mm, 64 grad
This 150mm Flex Precision Economy priced stainless steel rule has etched black graduations for easy reading and long life.  The graduations on side 1 are  mm and .5mm. The width is 15/32".  The sliding pocket clip allows for use as depth or height gage.