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Hectometer or hectometre is a measurement of distance. It is equal to 100 meters. It is a uncommonly used unit of length in the metric system. Plural name is hectometers.
The French scale or French gauge system is commonly used to measure the size of a catheter. It is most often abbreviated as Fr, but can often be seen abbreviated as Fg, Ga, FR or F. It may also be abbreviated as CH or Ch (for Charrière, its inventor).