On Fri, 29 Jul 2011 15:24:57 -0400, "Flying Pig"
wrote:

That appears to be a 134A on a refrigeration line. I need something to get
the gas out of the can and into the feed line on the gauge set, which has
double-ended schrader-female lines...

Do a Google search on "r134a can tap".

You can buy them anywhere.