Cutting Tips are precision machined from high quality copper alloys for durability. The passages for single-piece acetylene tips are accurately swage-formed and shaped on polished mandrels for smooth and efficient gas flow. Dual-piece tips, featuring an internal spline configuration and designed for alternate fuel gases, and offer the optimum in cutting performance. High speed cutting tips feature stainless steel insert core for a longer life. 173C-5 is 100% flame tested.