RMU Digital Thickness Gauge 3 Ranges Available: 30, 50 or 70 mm Resolution: 0.01 mm / 0.001 inch Thickness gauge to determine the thickness of leather, textiles, cardboard, felt, rubber, sheet metal, foil, plywood, plastic, etc.   Features  RS232C Data ouput  User selectable measuring       units, inches or millimeters    Specifications Measuring Range RMU-30: 30 mm RMU-50: 50 mm RMU-70: 70 mm    Resolution RMU-30: 0.01 mm RMU-50: 0.01 mm RMU-70: 0.01 mm    Jaw Depth 50 mm (all models)    Feeler Shape 10 mm Ø (all models)    Display LCD, 7 mm high (all models)    Measuring System Capacitive (all models)    Battery 1.55 V SR 44 (all models)    Weight, net (gross) RMU-30: 200 g (250 g) RMU-50: 220 g (270 g) RMU-70: 250 g (300 g)