Similar in size to a standard credit card, this transparent gauge is marked with a range of graded lines. Each line is a specified width.
To use, position the gauge over the crack and identify whcih line is a similar width to the crack. Read off the width value.
|E143----1||Elcometer 143 Crack Width Ruler|
|Range||0.10 - 2.50mm (0.004 - 0.100")|