Buy Steel Ruler 12" With CM Reading and Conversion Table on Back (In to MM) online from PMC Supplies. See our other products.
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CHECK your measuring tape! (I have been using this for years. agony) : r/sewing
The set include 2 piece 6 inch (150 mm) ruler Metric and Imperial Graduation; With conversion table on the back side Clear marks for your convenient
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Found a decimal inch tape measure : r/engineering