The front cover is made of stainless steel, corrosion resistance High temperature resistance, chemical resistance, oil resistance, waterproof and 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 fuel level gauge meter Fixing dimension: 52mm(2inch) Indicating Range: E-1/2-FULL Working Voltage: 9-32V(12V/24V) Material:Stainless steel 316L bezel+anti-fog glass colour: black Material: stainless steel Package Contents: 1 x Fuel Level Gauge 1 x Multi-plug socket 1 x and English Instruction Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.