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Gauge Equivalents
Gauge Inches Millimeters
1 .289" 7.3
2 .257" 6.5
3 .229" 5.8
4 .204" 5.2
5 .181" 4.6
6 .162" 4.1
7 .144" 3.7
8 .128" 3.3
9 .114" 2.9
10 .102" 2.6
11 .090" 2.3
12 .081" 2.1
13 .072" 1.8
14 .064" 1.6
15 .057" 1.4
16 .051" 1.3
17 .045" 1.1
18 .040" 1.0
19 .035" .9
20 .032" .8
21 .028" .7
22 .025" .6
24 .020" .5
26 .015" .4
28 .012" .3
30 .010" .25