Conversion Table 3 4 5 6 7 8 9 10 1 mm 2 mm 3 mm 11 12 13 14 15 16 17 4 mm 5 mm 18 19 20 22 24 26 28 6 mm 8 mm 30 32 34 36 38 10 mm 12 mm 40 42 44 45 15 mm 6 Colorado, USA / 1.800.821.7496 / www.SontecInstruments.com