SPI Electronic Caliper This SPI Heavy-Duty Digital Caliper includes absolute encoder which eliminates zero setting on power up. Specifications Include... 0-8" / 200mm Measuring Range 0.0005" / 0.01mm Resolution + 0.0015" Accuracy 1.97" Jaw Length Features Include... Inch-Metric conversion SPC Output ZERO / ABS button allows display to be zero-set at any slider position along the scale. Internal measurement jaws are rounded to provide accurate measurement of internal diameters Minimum internal diameter measurement capability of 20mm Absolute and incremental measuring modes Jaw thickness: 0.138" Hardened stainless steel construction Thumb wheel Power: CR2032 battery Short form Calibration Certificate included Furnished in fitted case UPS Ground Shipping ONLY