I put an aluminum one. I didn't know that brass ones were still available until I started this thread. If I had known that brass ones were available, I would have gotten one for sure. I put an aluminum one in my 95 YJ too. If this aluminum goes, at leas I know how to do the job. Not fun, bit not overly difficult either. I bought a 2 stage vacuum pump and a good AC gauge set so I can do my own AC now, which makes things a lot easier.