Applied Technical Services Standards Lab can perform Gage block calibration services on English/Inch Gage Blocks or Metric Gage Blocks. Our Federal 130B-38W1 Gage Block Comparator can measure blocks from 0.004 inches through 4 inches (0.10 mm – 100 mm) and our Federal 130B-58W1 Long Gage Block Comparator can measure blocks from 5 inch through 20 inch (125 mm – 500 mm). These comparators also utilize the Mahr Federal Gage Block Measurement Software, which allows for greater accuracy in measurement and computer-generated data reports. Data reports include initial deviation measurement along with additional measurements for flatness and parallelism, expressed on the data sheet as ViL (Variation in Length), in accordance with applicable tolerances for the grade of blocks being certified.