Check the listing for details. UNIMIG Flashback Arrestors, Oxygen Acetylene or Oxy LPG, Acet Propane Welding. Condition: New. Listed at 74.83 USD. UNIMIG IBEDA Flashback Arrestors can be used on single cylinders, torches, and cutting machines. These flashback arrestors offer features such as a gas non-return valve, a flame arrestor, and a thermal cut-off valve. The IBEDA flashback arrestor is suitable for all standard gas types and provides optimal protection against any potential flashback, gas return and also against burn-back.