A clean, black and white face means the Mini Tech SPG is easy-to-read. This naked gauge has a 2-inch diameter with a 1.75-inch face (RG2762-NH).A Bourdon tube gauge, the Tech SPG is calibrated to 5000-psi in 100-psi increments (360-Bar in 10-Bar increments) for the highest level of accuracy. A tempered glass face is impact and scratch resistant, while the luminescent dial makes it easier to read in low light situations.Comes standard as a naked SPG with a spool to attach a hose swivel to the gauge. A boot is available as a separate option, if desired. The Mini Tech SPG is suitable for oxygen service and is CE approved.