Description: Measuring Range: -0.1 - 1.8MPa / -30 - 260 PSI Application: Water, Oil, Air & Hydraulic Application, including R22 R134a R404A R407c refrigerants Clear and fast reading, dual scale: PSI / MPa; Dial Size: 62mm / 2.4inch in diam. Made of aluminium for protection in harsh environments Copper Alloy Center Back Mount; 1/4" NPT (for 2-1/2" dial) Specification: Measuring Range: -0.1 - 1.8MPa / -30 - 260 PSI Case: aluminium case for protection in harsh environments Connection: Copper Alloy Center Back Mount; 1/4" NPT (for 2-1/2" dial) Application: Water, Oil, Air & Hydraulic Application Dial Outer Diam: 85mm / 3.3inch Dial Inner Diam: 62mm / 2.4inch Dial Full Height: 58mm / 2.3inch Scale: Dual Scale - PSI / MPa Movement: Copper Alloy Package Includes: 1 Piece Liquid Filled Pressure Gauge Note: This item should be stored in a dust-proof, dry, and non-corrosive environment if it was not used