Urethane Supply Co. 6057-C Nitro Fuzer Welding System combines hot air and nitrogen welding for maximum versatility. It incorporates several upgrades, including fine-flow control regulators on both air and nitrogen sides that are combined with output pressure gauges and a flow gauge to give users the ultimate control over how much gas is used in the welding process. The Nitro Fuzer also has a pressure safety circuit to help prevent burned-out heating elements, an electrically actuated air-nitrogen switch, and a melt-proof silicone and fiberglass braided hot air welder hose.