4-Step wedge calibration block

Thickness and linearity calibration. Step wedge 4 imperial (0.25,0.5,0.75,1.00 inches), Step wedge 4A (6.25,12.50,18.75,25 mm) and Step wedge 4B (5,10,15,20 mm) with face dimension (0.75 x 0.75 inches) for imperial and (20 x 20 mm) for metric. In accordance with ASTM E797.