Use no oil gauge is designed for welding, medical, and compressed gas ... :1.5",2" or 2.5" 2.Suitable Pressure Ranges:15 psi to 10000 psi3.Instrument Connection:1/ ... Fill Fluid:Glycerined(silicon oil) Primary Competitive Advantages:Well and High Quality Control, Prompt Delivery, New Product, Customer's Design ... Design, Small Order Acceptable, ODM Accepted, OEM Accepted Pressure Gauge TYPE7-BOTTOM-C