To order a Tig Finger, go to http://weldmongerstore.com/
for more detailed info go to http://www.weldingtipsandtricks.com/6g-weld-test-ua41.html
The UA-41 pipe welding test is 2 inch schedule 80 carbon steel pipe welded using 309 stainless filler rod. The reason it is a common test is that In some cases, it qualifies a welder to weld both stainless and carbon steel within certain limitations. So it makes sense for a contractor to get the most value out of one single welding certification test.