r-12
On my caprice I know because it was a police car it used R-12 and it can't be bought in stores. Only mechanics are authorized to carry it!
Was built for R12, should be converted to R134a
R134A
r134a
134
R134a
R134
r-134
Was built for R12, can be converted to R134a.
for everyday use (TRW)
You must be licensed and certified to use freon. Are you?