What is .380mm?

As an AI language model, I cannot find information about .380mm. However, I can provide you with some general information about the millimeter (mm) unit of measurement.

• The millimeter is a unit of length in the metric system, which is based on multiples of ten.
• One millimeter is equal to one thousandth of a meter or 0.03937 inches.
• Millimeters are commonly used to measure small objects and distances, such as the thickness of a piece of paper or the size of a screw.
• The symbol for millimeters is "mm" and it is written after the numerical value, such as 10mm or 2.5mm.