This site doesn't have a listing for French. French is a gauge that is commonly used to measure the width of medical instruments (pacifically catheters). French is often written as F or Fr. The French gauge is one third that of a millimeter. To convert Fr to mm, take the Fr number and divide by 3. From mm to Fr you would multiply by 3.
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| 10/06/2016, 4:54 AM | French(Fr) to mm |