Seconding Taprite. Micromatic also makes decent regulators, but based on a sample size of 1 purchase, they sent an unassembled product even though I bought the more expensive pre-assembled one, it had a broken gauge, and one port leaked. Their customer service was painful to deal with. Hence, Taprite. They at least used to have the gauge scale misaligned years ago -- I had a few -- and if it was too misaligned (= needle didn't move), getting a replacement from Amazon was easy enough.