Forged brass body and case cover
Delrin cap bushing for smooth adjustment
Self-resetting external safety relief valves for oxygen, inert gas and air models
Sintered bronze inlet filter
Bar seat assembly, more reliable performance
2" meter for easy reading
2" diaphragm
Steel gauge protectors are color-coded: oxygen (GP21X) is green and acetylene (GP21Y) is red
Weight: 2 pounds, 11 ounces
UL certification
