1. 50mm 0-400 bar pressure gauge 2.OEM available 3. ... =2''. Or, your customized size4. Measurement range: 0~400bar, 0~6,000psi (dual scale)5. Coupling: Bottom or back connection6. Thread Coupling ... , Certificate of Utility Model Patent11. Dial plate: Single or dual scale (psi, kpa, mpa, bar, kg/cm) available12. Measuring medium ... 50 bar the red light on switch lighted. 50mm 0-400 bar cng pressure gauge