The item is a professional digital display thickness measurement tool. A very useful digital thickness gauge, measuring range is 0-1.8mm. This Coating Thickness gauge adapts Electromagnetic Induction principle and magnetic Induced . It can measure the thickness of non-metal coatings on metal surface. Features - Color: Yellow. - Material: ABS. - Size: About 65X31 08mm . - Measuring range: 0 - 1.80 mm / 0-0.07"/0 - 71.0 mil - Resolution: 0.01 mm / 0"/1 mil - Measurement error: + / - 0.03 mm/0" - Minimum diameter of : 50 mm/1.97" - Minimum thickness of : 0.5 mm/0.02" - Power supply: 2 .5V( AAA batteries) (Purchase by your own) - Operating temperature range: 0 -40 degree centigrade - Working humidity range: 10-95% RH - This unit is perfect for manufacturing company, metal machinery industry, chemical industry, and commodity inspection especially in automobile trading. - Compact design and easy to carry. - Digital LCD display. - Comes with iron base and non-iron (aluminunm) base. Package list: 1 X Thickness Gauge Tester