1pcs 25-200mm Calibration Block Rod Bar Gauge Bar And 25mm Ring Gauge For Caliper Inner Diameter Outer Diameter Micrometer - Micrometers - AliExpress
A guide to gauge calibration
FMHXG Standard Caliper Calibration Block Micrometer Reference Rod Gauge Accessories Measuring Range 50mm 1.97 Inch Stainless Steel Calibration Bar: Amazon.com: Industrial & Scientific
OTVIAP Stainless Steel Outside Micrometer Standard Caliper Calibration Block Rod Bar,Calibration Rod, Calibration Rod Bar - Walmart.com
Standard Caliper Calibration Block, Stainless Steel Outside Micrometer Reference Block Rod Bar Measuring Range 25mm, 50mm, 75mm, 100mm: Amazon.com: Industrial & Scientific
Gauge Block Set Metric Steel 103 blocks – engineering-gauge.co.uk