Flashback Arrestor Set, Mounting Location Torch, Compatible Gas Type Fuel, Oxygen, Inlet Connection Size 9/16 In.-18, Outlet Connection Size 9/16 In.-18, Inlet CGA Number (Fuel) CGA 023, Inlet CGA Number (Oxygen) CGA 022, Hose Fitting Size B, Body Material Brass, Inlet Connection Type UNF, Maximum Flow Rate (Fuel) 175 scfh, Maximum Flow Rate (Oxygen) 1,700 scfh, Outlet Connection Type UNF, Product Type Flashback Arrestor Set, Series H743, Standards UL Listed