Radnor Flashback Arrestor Set Torch Style 64003941

Got a brand new set of Radnor flashback arrestors here. These are the B-size ones with the 9/16 - 18 UNF threads and they have the reverse-flow check valves built in. Packaging says they are the torch style ones (part number 64003941). Still in the original plastic, never used. Good safety gear to have if you're doing any oxy-fuel welding or cutting.