442C medium duty cutting attachments are machined from high quality die-forged brass for durability and stainless steel components. 442C features a flat seat tip design and an in-head mixer, and have three tubes in a triangular arrangement. It has stainless steel tubes for strength & long life and a stainless steel oxygen lever for durability. The spiral mixer gives an optimum mix of fuel & oxygen, and the brass coupling nut and double o-ring seal gives quick, hand tight, & leak-free operations.