Ultrasonic Calibration Test Block 5 Step 0.050"  0.250"  0.500"  1.00"  2.000"
 
Details
Application: for thickness and linearity calibration
Dimensions: 4''x0.8''
Material: 1018 steel

Listing including
A step testing block 5-step block 0.050"  0.250"  0.500"  1.000"  2.000"