Baker Instruments AVNC Series Stainless Steel Dual Scale Pressure Gauge, 0 to 600 psi/kPa, 2.5"Dial, -1.6% Accuracy, 1/4" NPT Bottom Mount, Glycerine Filled 2.5" diameter dial pressure gauge Dual scale (0-600psi / 0-4000kPa), 1.6% accuracy Stainless steel housing and brass parts Bottom mount 1/4" male NPT connection Glycerine filled