Attributes . Die-Forged Brass Head for Maximum Durability, Universal Gas Mixer Gives Top Performance With Any Fuel Gas, Ribbed Brass Handle for Sure Grip & Operator Comfort, Built-in Reverse Flow Check Valve for Added Operator Safety, Smooth Cutting Oxygen Valve Provides Precise Low-To-Full Flow Oxygen Control, Stainless Steel Tubes for Greater Strength & Durability Stainless Steel Cutting Oxygen Lever for Extra Durability and Operator Comfort, Built-in Flashback Arrestors for Added Safety (U.S. Patent #5407348) . Names