Used to check the pressure in tanks with SCBA tanks with CGA 346/347 type valves. Has a sealed, stainless steel cased 5,000 psi oil-filled gauge for constant, rugged usage. CGA attachment and bleeder are stainless steel for added durability. Gauge is protected in a deluxe rubber cover/protector. All Global tank checkers come with an integrated bleeder. Service to 4,500/ psi. Air service only.