The Weldmark® by Victor® Propane Harris 6290NX series Oxy-Fuel Size 1 Cutting Tip has a 5/8-1 inch cutting capacity. This general purpose Harris 6290NX series tip is 0.8" long and 3.3" wide, and comes in two pieces with a spline insert. It is ideal for hand and machine torch cutting. It's designed for use with Natural Gas and Propane. The max Propane pressure is 2 and the max oxygen cutting pressure is 50. Oxy-Fuel cutting is a thermal cutting process utilizing oxygen or fuel gases to cut through metals such as mild steel. In this process, the torch heats the steel to its ignition temperature, after which oxygen is directed to the cutting point, burning it into a metal oxide. A stream of gas blows the metal oxide away from the work area, resulting in a clean cut.