made of "DELRIN", white or black
not scratchable, indeformable, high precision
with 4 different graduations. Length: 250 mm
1 = French Calibration 1 - 36
2 = Circumference in mm 41 - 76
3 = American calibration 1 - 15
4 = Diameter in mm 13 - 24,2
colour: black