The
SB-5L Steel Test Block offers calibration points from one tenth to one half inch in 0.1" increment (2.4, 5.08, 7.62, 10.16, 12.7 mm). Steel calibration test blocks allow you to conveniently check the accuracy of ultrasonic thickness gauges. All blocks are made from ultrasonically tested material and include NIST traceable Certification Reports and hardwood storage cases