Multi-material sheet metal thickness gauge

Sheet metal thickness guage from imperial 18ga to 7ga, with a selection of common rod diameters on the other side. Imperial guage sizes vary depending on the material being measure (by just a small amount, for example 12ga in Aluminum is 2.053mm, but in stainless its 2.778) so I have included a thickness guage for mild steel, aluminum, stainless and galvanized. The models for these are technically very accurate, but the result will always depend on the accuracy of the printer. When printing these models, the profile was set up with the Arachne wall generator printing outside to inside which should give the best accuracy. I have included all of the models for completeness, but unless you struggle to tell the difference between the types of metal then just printing the Mild Steel gauge will suit most people. I have also included a metric version which has obsolute measurements.