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THE DIFFERENCE BETWEEN SOUNDS AND DILATORSBy Chase-Simmons IndustriesThere is a lot of confusion about Sounds & Dilators. They are two entirely different animals for two entirely different purposes. Although Dilators may be used in some instances like sounds.Let’s start with some definitions:French Size: Most Sounds & Dilators (Hegars being a exception) are calibrated in French Sizes. French size is defined as millimeters in circumference or the distance around the shaft. Please do not c …