Master Setting Discs
A collection page of WESTport
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Products
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Published
2026/05/06
About
A measurement is only as good as the master it's set against. WESTport master setting discs give bore gages, air gages, and comparators a precise, traceable zero. Available in Style 1, 2, and 3, class XX and X tolerance, each disc is NIST-traceable and certified in our ISO/IEC 17025 accredited laboratory.