Heavy duty Brass R12 to for R134a and for R134a to R12 adapter sets. Can be used in hose, storage tank or vacuum pump. Models: for R134a to R12 adapter and R12 to for R134a adapter. Solid brass. R12 to for R134a adapters are 1/4 "female fillet x 1/2" male fillet and brass.
eBay