Reason for selling, just down sizing is all. Free UK Delivery on Eligible Orders! QR Code Link to This Post. Fill Your Cart With Color today! Argon is used as shielding gas in arc welding. But you don't have that much money to spend. Hydrostatic or ultrasonic, and usually have unlimited service life. I know very little about them as I am sure you could fill them with anything and use them for anything. Have any questions, give me a call and ask for Rick try the craigslist app » Android iOS CL. phoenix > west valley > for sale > tools - by owner. post; account; favorites. hidden. My father used them for glass blowing.