... anti-vibration function. OEM"Pressure Gauge"Technique Specification:1. Dial Size: 1.5" (38mm) / 2" (50mm) / 2.5" (63mm) / 3" (80mm) / 4" ... Back (Horizontal), Lower Back,4. Connection Size: 1/8",1/4", 3/8", 1/2"NPT, BSP, Customer-made is available5. Bezel: Crimped ... bezel, Detachable bezel6. Accuracy: 3-2-3%, 1.6%, 1%Material Details:1. Case ...