Glycerine filled Pressure Gages provide added durability in applications where vibration or pulsation is present. Stainless steel case and bezel, copper alloy internals. Available in both Lower and U-Clamp Panel Mount. Standard Features: 2.5 inch dial 1/4 inch NPT thread connection Glycerine filled Stainless Steel case and bezel Copper Alloy internals Polycarbonate lens Dual Scale -- PSI/Bar (x 100 = kPa) Ambient Temperature: 30°F to 160°F (-1°C to 71°C) Accuracy: 2-1-2 % of span ASME B40.1 Grade A