Precision Steel Rectangular Gauge Block 1.3mm Grade 1 (1.3-1BM1/PD)

Precision Steel Gauge Block 1.3mm Grade 1 (1.3-1BM1/PD) is a master calibration length standard crafted from high-carbon chromium alloy steel, heat-treated, sub-zero treated, and lapped to sub-micron flatness and wringing capability for micrometer and caliper calibration.