This hydraulic liquid filled pressure gauge measures in the pressure range of 0-160 PSI and is great for pneumatic systems, compressors, hydraulic systems, pressure washers and more. Can also be used in applications with any fluid, liquid, or gas that is compatible with brass. Features a PSI only face for easy pressure reading. Liquid filling helps keep needle steady under vibration for more accurate readings. Specifications:Case Material: Stainless Steel Ring Material: Stainless Steel Window Material: Polycarbonate Connection Material: Brass Liquid Fill Material: Glycerin Connection Type: Lower mount Connection Size: ¼" NPT Face Size: 2 1/2" | 63.5mm Pressure Range: 0-160 PSIG Meets ASME B40.1 Grade A 2%-1%-2% Accuracy Standing Please contact us if you have any questions.