Regulator style Flashback Arrestor Set

Welding Cutting Regulator-Hose Flashback Arrestors Set with standard fittings. One side is oxygen and the other is fuel (for acetylene or propane). They fit on the regulator between the outlet and hose. The regulator flashback arrestors have standard B sized inlets and outlets. Oxygen max psi is 210, fuel is 21 psi. Length is just over 3".