The Weldmark by Superior WEM YV50 Oxygen Y connector is designed for use with two cutting and/or two welding torches at once, Cutting or welding torches, and approved for oxygen. It is constructed from brass, and has a maximum fitting pressure of 200psig. Technical specifications are CGA 022, and regulator side nut type B. The thread types are .5625-18 right hand UNF threads, with female threads on the regulator side, and male threads on the outlet side. Made in the United States.