239 inches
.1406 inches or 3.57 mm thick. (USG)
It is the same as 5.5cm which is about 2 inches thick
Intake is .002-.004 inches and exhaust is .006-.008 inches when cold.
0.5 inches thick
Not thick enough.
.1250 inches or 3.18 mm
18 gauge steel is typically 0.0478 inches thick.
It is 1.524 millimetres thick.
.0762 inches
about 4 inches thick
about 3 inches thick