The front cover is stainless steel ( resistance is 304) High temperature resistance, chemical resistance, oil resistance, waterproof and dustproof grade IP67 The meter comes with an alarm signal and does not require an additional alarm signal from the sensor. High brightness LED for backlight, high brightness and Name:52mm Universal Oil Pressure Gauge Fixing dimension: 52mm(2inch) Indicating Range: 0-5Bar 0-73psi Working Voltage: 12V/24V colour: white Material: stainless steel Package Contents: 1 x Oil Pressure Gauge 1 x Multi-plug socket 1 x Chinese and English Instruction Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.