Miller Electric PRO 300 CAT Owner's Manual page 51

Notes
MATERIAL THICKNESS REFERENCE CHART
24 Gauge (.025 in)
22 Gauge (.031 in)
20 Gauge (.037 in)
18 Gauge (.050 in)
16 Gauge (.063 in)
14 Gauge (.078 in)
1/8 in (.125 in)
3/16 in (.188 in)
1/4 in (.25 in)
5/16 in (.313 in)
3/8 in (.375 in)
1/2 in (.5 in)
OM-236 948 Page 47