Pressure Gauge, Manometer, CNG Pressure Gauge manufacturer / supplier in China, offering 2.5" (63mm) Stainless Steel Back Non Liquid-Filling Pressure Gauge CE 1.6/2.5, 4" (60mm) Liquid-Filled Pressure Gauge Manometer En837-1 Btm G Thread, Power Ybf100d Full Stainless Steel Back CE En837-1 Pressure Gauge Manometer and so on.