Used to verify the accuracy and calibration of magnetic or eddy current-type coating thickness gauges. Includes a zero (uncoated) plate and two other coated plates of certified thickness mounted in a durable leatherette case. Manufactured to a resolution of 0.0004 mils (0.01 microns) with an accuracy of +1.5%. Directly traceable to the National Institute of Standards and Technology (N.I.S.T.). Certificate of Accuracy included. Used for ferrous metals (steel) 2.00 mils (50 microns) 20.0 mils (500 microns) PosiTest F & FM Positector 6000 F & FN