Features: The gauge is an instrument for measuring the thickness of clearcoat coatings to an accuracy of 20 microns. It is used to quickly and accurately check whether a vehicle has been painted in the past. The tester does not require battery power, is calibrated and can be used for many years. The tester has a colour scale in µm, which makes reading the thickness of varnish or putty very easy, even for those who inspect cars for the second time. It is a meter and tester because it has the ability to measure the thickness of varnish and a quick test for detecting the thickness of paint coatings invisible to the naked eye on vehicles made of sheet steel and galvanised steel. Product parameters: Colour: black Material: aluminium + plastic + magnet Accuracy: 20 µm Size: 10.5*1cm The individual colours on the scale indicate Blue coating with a thickness of 0 to 100 microns - varnish thin coating (no base or repeatedly polished varnish) Absorbing magnet, simple design with magnetic tip for sticking to any curved surface or hard to reach areas Micron colour scale, very easy to read the thickness of varnish or putty Usage: 1. Wipe the area with water on a damp paper towel before use, then dry with a dry paper towel 2. After cleaning, open the tester cap and adsorb onto the car paint (note: pull not too fast, pull gently) Product list: 1* Test pen