... 2.Connection: 1/2, 1/4 , 3/8 Pressure Gauge,tire pressure gauge,pressusre meter,gauge,Freon Pressure GaugeKey Specifications/Special Features:Case material: steel or ... -inch Connection: 1/4, 1/2 and 3/8-inch Threads: BSP, NPT and PT Bottom or back Window: safe glass Dial ... range: 0 to 40 and 40 to 1,000Mbar Accuracy: 1% for 3 and 4-inch Operating temperature: -20 to ...