Usage Tips:ACCURACY MECHANICAL MOVEMENT DESIGN: This anolog pressure gauge is calibrated to 6000psi/400Bar, accurate reading; Mechanical design gives you no fear of digital failure. LIQUID FILLING WITH CLEAR DIAL: Liquid Filled filled to enhance the reliability and integrity; helps dampen the effect of vibration and pulsation; Clear dial with dual two colors scales easy to read; BUILD: The stainless steel construction is built to outlast the competition from normal steel or plastic gauge. The superior quality stainless steel and brass components the gauge corrosion resistance and extends the gauge life. THREAD ADAPTOR WIDELY APPLICATION for both 1/8NPT , self-seal conector, for meausring liquid and gas pressure including fuel pressure; perfect for pumps, compressors, hydraulic presses, machinery, pneumatic equipment and motors in harsh environments. Colour:As Shown Material:Metal Size:33mm diameter Package Contents: 1 x pressure gauge Only the above package content, other products are not included. Note: Light reflection 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.