Standard Pack = 1 piece(s). Air Cushion = Yes; Digital output = USB and RS232; Maximum Permanent Error = 2 + L/400 um; Measuring force = 1 N +/- .2; Measuring Span = 0 - 600 MM / 350 - 950 MM; Operating temperature = 10 to 40 degree Celsius; Repeatability in flat surfaces = 0.001 MM; Repeatability on inside bores = .001 MM; Resolution = .001 / 0.001 / 0.0005 / 0.0001 MM; Squareness = 6 um; Type = Glass Scales;