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A clean, black and white face means the Tech SPG is easy-to-read. This naked gauge has a 2-inch diameter with a 1.75-inch face. A Bourdon tube gauge, the Tech SPG is calibrated to 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. The Tech SPG is suitable for oxygen service and is CE approved.