Defelsko Certified Step Block Inch 

Ideal for checking calibration and operation of ultrasonic thickness gages and are an important component in fulfilling both ISO and in-house quality control requirements.

• Composition - 1018 steel
  - imperial units
  - imperial units: (100, 200, 300, 400 and 500 mil steps)
  - imperial accuracy ±1 mil

• All Certified Step Blocks are supplied with a certificate of calibration showing traceability to NIST/NPL.