Assuming this is a firearms question- the 14 gauge shotgun is very rare today. The bore diameter is smaller than a 12 g, larger than a 16g, and runs ABOUT 0.695 inches. That converts to about 17.65mm. If you are seeking to convert wire gauge, or sheet metal gauge to mm, please repost with that information.
In gauge measurements, 1.5 mm is approximately 16 gauge. Keep in mind that gauge measurements can vary slightly depending on the specific material or standard being used.
1.6mm
14 gauge
12 gauge is thicker than 14 gauge.
2.10mm thk
14 gauge is 0.0641 inches or 1.63mm in diameter.
10 gauge: 3.57 mm11 gauge: 3.18 mm
The thickness of 14 gauge (14g) steel is approximately 1.6 millimeters.
0.7 mm = 21 gauge- Google it
The closest would be 18 gauge which is 1.27 mm
These two terms refer to the distance between rail tracks.The most common rail gauge in the world is standard gauge, also called Stephenson gauge, which is 1435 mm between the tracks. Approximately 60% of the railways in the world are standard gauge.Narrow gauge is anything narrow than this, broad gauge is anything wider.Common narrow gauges are:metre gauge (1000 mm) cape gauge (1067 mm or 3 ft 6 in).Common broad gauges are:Russian gauge (1520 mm) Irish gauge (1600 mm)Iberian gauge (1668 mm)Indian gauge (1676 mm)
Probably 25 gauge, which is .556 mm thick. However, 26 gauge is close too, it is .478 mm thick.