Product Details: The Silicone Filled Pressure Gauge - Stem Mount from Buyers Products maintains accuracy and readability in the most extreme temperatures and work conditions. The silicone also protects the delicate workings of the gauge against vibration and keeps out dirt and condensation. The dual scale, 2-1/2 in. diameter gauge has a stainless steel case and bezel, and features a built-in relief valve. Its stem fits a standard 1/4 in. NPT. The gauge has an accuracy within 1.6%. Choose from a range of gauges measuring from 0-100 PSI to 0-10,000 PSI.