IIW Type 2 Calibration Block

IIW Type 2 Calibration Block. This is a modified version of the original IIW-Type 1 design. Includes a 2.0” radius x .250” deep cut-out superposed on the 4.0” radius for distance calibration. Also includes numbers 3, 5 and 8 through holes (3/64”, 5/64” and 8/64” diameter) and distance calibration marks to the 2.0” hole. In accordance with International Institute of Welding.