Please feel free to buy our products, we have excellent after-sales service. Your Smile is Our Happiness.If you are not satisfied with our products, please contact us and we will serve you wholeheartedly. Specifications: Model: UA5169 Material: ABS Plastic Sensor Probe Type: Fe / NF Working Principle: Magnetic Induction(Fe) / Current(NF) Range: 0～1300um, 0～51.2mil Units: μm, mil Accuracy: ±(3%+2μm), ±(3%+0.08mil) Resolution: 0.1μm, 0.01mil Calibration Points: ZERO/50μm/100μm/250μm/500μm/1000μm Minimum Curvature Radius of Convex Side: 1.5mm Minimum Curvature Radius Concave: 25mm Minimum Measuring Area: Diameter 6mm Minimum Thickness of Substrate: 0.5mm(0.02") (Fe) / 0.3mm(0.012") (NF) Operation Temperature: 0～40°(32～104°) Working Humidity: 20%～90%RH Power Supply: 1 * 9V 6F22 Battery(NOT Included) Item Size: 120 * 65 * 32mm / 4.7 * 2.6 * 1.3in Item Weight: 106 / 3.8oz Package Size: 19.5 * 9.5 * 6.5cm / 7.7 * 3.7 * 2.6in Package Weight: 250g / 8.8oz Package List: 1 * Coating Thickness Gauge 1 * Iron Substrate 1 * Aluminum Substrate 1 * Protective Carrying Bag 5 * Thickness Calibration Foil 1 * User Manual If you do not understand, please send us an email.