Single scale & dual scale replacement gauges for your oxygen & fuel regulators. There's no need to buy a new regulator just because of a busted gauge. Most welding supply stores don't even stock these in order to force you to buy a new regulator. To install just take out the old gauge wrap the threads on the new one with white sealing tape & thread back into your regulator. These gauges are 1/4" NPT it is the standard on all brands of regulator gauges.
