LIQUID FILLING WITH 2-1/2" 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 make it easy to read; | PORFESSIONAL GRADE VACUUM PRESSURE GAUGE from -30" to 0 inhg(-1 to 0 bar), Accuracy comply to ASME B40.100 standard.Widely appply for measuring the vacuum of gas and air, suitable for vacuum pump, vacuum tank or other vacuum system. | STAINLESS STEEL CASE WITH DURABLE CONSTRUCTION is built to outlast the competition from normal steel or plastic gauge. The superior quality steel and brass ensure the gauge corrosion resistance and extends the gauge life. | MATERIAL:Stainless steel case, brass wetted parts, glycerin filled. | LIFETIME SATISFACTION GUARANTEE AND FRIENDLY CUSTOMER SUPPORT,Buy with confidence,save your time and money, and enjoy accurate measure experience.