Do not get welding gas supply's from AirGas at this location. I got bad MC size tanks there. The valves were frozen shut on many tanks and I found out later some were leaking. After going though 7 tanks to find a working one I got to my work shop to find it was 3/4th empty and they refused to replace it when I came back to the store 45 minutes later. I sent there customer service an several e-mails and got no answers.