Fowler Electronic Height Gage Features include.. Scale not affected by oil, dust, chips, magnetism, shock, ect. Direct RS-232 output The Sylvac measuring system is exceptionally fast (60" per second traverse) and is the most reliable and maintenance free system ever created for measurement. Technical Data Includes... Measuring Range: 0-16" / 400mm True inch/metric conversion. Accuracy: .002" / 50um Resolution: .0005" / .01mm Repeatability: .0004" / 10um Base Size: 5.6" wide x 6.8" length 8mm probe shank