the mill contains balls from 80 mm to 30 mmthe mill contains balls from 80 mm to 30 mm Convert mils to mm Conversion of We assume you are converting between mil and millimetre You can view more details on each measurement unit mils or mm The SI base unit for length is the metre 1 metre is equal to 39370 mils or 1000 mm Note that rounding errors may occur so always check the results