Ultrasonic Calibration Block Test Block ASTM E164 sensitivity calibration

What is used for: 

It is AWS-type which used for shear wave sensitivity calibration. It includes two 062" diameter through holes(1.6mm holes). In accordance with ASTM E164 and BRR/AWS standards.

Specification: 

Dimensions: 76.2mm*31.75mm*22.99mm

In accordance with ASTM E164 and BRR/AWS requirements.
1018 carbon steel 

with wooden carrying/storage case