Style 144 one-piece cutting tip is designed for general-purpose, hand-cutting applications over a wide range of plate surface conditions. The tip has six preheat flames and can be used to cut material up to 7 inches (17.8 cm) in thickness with acetylene at speeds of 4 to 24 inches per minute (IPM) based on tip size and material thickness. For material over 7 inches (17.8 cm) in thickness, use style 164 cutting tip