Up for auction is a used but in great shape SPI 3 inch gage block. I have used this as a calibration tool for my calipers but have since gotten a set of standards and dont need the gage block anymore.
Premium Gage Block Set 81PC Grade 2 High Precision Made of fully Ziconia Ceramic with a coefficient of expansion only 2x-0.00001/C to provide both long wear and resist corrosion, defacement. require no protective coating. Manufactured under carefully
Starrett Webber Square Steel Gage Block Set Micro Calibration kitModel SS88A1 Grade 2Manufactured date 8-9-82 All pieces are engraved by Webber EXCEPT the .750 which is a Mitutoyo branded block.All pieces match the size
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