... & Back Connection 3.CE,Rohs Tire Pressure Gauges used in Air Compressors,Hollow Pumps,Air-Pressure Piping,Pressure Regulating Values,Testing Equipment,Medical Sterilizers ... , 0 - 15psi - 10,000psi (customer-made pressure range)4. Connection: Bottom (Vertical), Center Back (Horizontal), Lower Back,5. Connection Size: 1/8 ...