Features 【Easy to Control】Easy to control, check, clean and repair. 【Built-In Check Valve Prevents 】Built-in check valve prevents the reverse flow of gas. 【Rugged And Corrosion Resistant】High quality brass construction, rugged and corrosion resistant. 【High Quality】100% brand new and high quality. 【Useful Tool】Meet the requirements of welding process, no influence on the flame temperature, gas flow, etc. Specification: Type: HF - 2 Size: M16*1.5 Working medium: Acetylene / Oxygen Working pressure: Medium pressure (MPa) Rated flow: 3 m3/h Thread Inner Diameter: M14 (mm) External Thread Diameter: M16 (mm) Tooth Spacing:1.5mm Action principle: Dry type Device location: Centralization type Weight: Approx. 2600g / 91.7oz Package list: 1 * Acetylene Flashback Arrestor 1 * Oxygen Flashback Arrestor Note: The product is a metric thread, and there may be incompatibility in North America. Please check the product information before ordering. Package List