... , 80 , 100mm 2.Connection: 1/2, 1/4, 1/8 , 3/8 Pressure Gauge,tire pressure gauge,pressusre meter,gauge Key Specifications ... : brass Movement core: brass Case diameter: 40, 50, 63, 80 and 100mm Connection: 1/2, 1/4, 1/8 and 3/8-inch Threads ... Accuracy: 1.5 to 2.5-inch: 1.6 to 2.5% 3 to 4-inch: 1%Operating temperature: -20 to 60 ...