Made from high quality die-forged brass Available in light, medium and heavy-duty models Featuring tube mix design, models 141C, 142C and 143CA can be used with acetylene, propane, MAPP®, propylene, fuel gases and natural gas (2 PSIG and above) Models 442C and 443C have three tubes in a triangular arrangement and feature a flat seat tip design and an in-head mixer Stainless steel tubes for strength and long life Push type oxygen valve provides smooth on/off oxygen flow control Stainless steel oxygen lever for durability Brass coupling nut and double O-ring seal gives quick, hand tight and leak-free operation Spiral mixer gives optimum mix of fuel and oxygen Forged brass head for durability