The Weldmart (Profax) spool gun is a direct-connect gun for the Millermatic 252 machine. The basic spool gun design has been on the market for over sixty-five five years. It will push wire for 0.025 the 1/16 wire and any alloy you can get on a standard 4" spool, no proprietary wire spools. Gun comes standard with 50 feet of lead, longer leads are avaiable Standard straight and 45' barrels are available. We can provide special-order barrels. Lead lenYou tell us what you need, you're the customer!