GENTEC® Cutting Attachments are made from high quality die-forged brass and stainless steel components. They are available in light, medium, and heavy duty models. Featuring drop-in tube mixer design, 143CA,  can be used with acetylene, propane, MAPP®, propylene, fuel gas, and natural gas (2 PSIG & above). 442C and 443C, both featuring a flat seat tip design and an in-head mixer, have three tubes in a triangular arrangement.