Check the listing for details. Acetylene (or propane) Welding, Brazing, TORCH End FLASHBACK ARRESTOR w/barb fit. Condition: New. Listed at 9.95 USD. <img src="https://ti2.auctiva.com/web/aswCredit.gif" border="0"><br><a href="https://pages.ebay.com/seller-center/listing/listing-advanced-sellers/third-party-listing-tools.html#auctiva" target="_blank"><img src="https://ti2.auctiva.com/images/sc1line0.gif" border="0"></a> Acetylene Flashback Arrestor. Attach at the Torch. Included is a barbed hose fitting in case you'd like to add a hose using a hose clamp. Add arrestor to your Torch, add the barbed fitting. Then add your hose using a hose clamp. Arrestor also has a check valve internally. Highest quality. 9/16 -18 threads, B Size. Left hand thread on the acetylene arrestor, both ends. We also carry the oxygen arrestor, or by the set. Please check our listings on eBay. We also carry check valves for the torch end, which you can use in combination with flashback arrestors. Please click here. Never connect a torch to acetylene and oxygen tanks without installing a set of flashback arrestors. Without these safety devices, it is possible a flash can occur within the hose, and ultimately follow back into the tanks, causing an explosion. This would be an extremely rare occurrence, but flashback arrestors in combination with check valves will make it a "never" occurrence. Check valves are only a first line of defense and may not ultimately stop a flashback. Only the flashback arrestors will. ISO 9001 certified factory. Thanks very much. Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.