Stable crack width chart made of plastic in graduations from 0.05 mm to 1.2 mm in 0.05 steps, as well as 1.3 / 1.4 / 1.6 / 1.8 / 2.0 / 2.5 / 3.0 and 3.5 mm.
On the reverse side, coloured fields indicate the temperature in 1° C steps (from 8° to 32° C.).
Place the card in the picture and use it to document the temperature of the contact surface.
