SPI Electronic Height Gage This Electronic Height Gage allows you the choice of using the included scriber for standard height measurements, or using the included Indicator Holding Bar to use a Digital Indicator for the height measurements with an increased resolution of 0.00005" and increased accuracy of 0.00016". Features Include... 0-18" / 0-450mm Measuring Range 0.0005" / 0.01mm Resolution with Scriber + 0.002" / + 0.05mm Accuracy with Scriber Inch/Metric conversion at any point Heavy Duty Stainless Steel Beam Zero-setting at any position Carbide tipped scriber Smooth slider wheel Large LCD Display Manual On/Off power Data Cable to connect Indicators included Indicator Holding Bar included For higher resolution & higher accuracy we recommend using either of the following SPI Digital Indicators... Digital Indicator # 11-965-1 0-.5" / 12.7mm Range 0.00005" / 0.001mm Resolution + 0.00016" / + 0.004mm Accuracy Digital Indicator # 11-966-9 0-1" / 25.4mm Range 0.00005" / 0.001mm Resolution + 0.00020" / + 0.005mm Accuracy