The Canneed ACH-100 Aerosol Curl Height Gauge is used for measuring
the contact height of the curl 1" aperture of aerosol cans.
ACH-100 is the Industry Standard.

The gauge is first calibrated by setting the calibration ring on the gauge. In this case the dial has to indicate the value of 4.25 mm.
The measurement on the can is then inserting the gauge up to the shank into the can and then slowly releasing the button.

Technical data:
Measure range: 0-10mm
Resolution: 0.01mm