... .Connection: 1/2, 1/4, 1/8 , 3/8 Pressure Gauge,tire pressure gauge,pressusre meter,gaugeKey Specifications/Special Features:Case material ... : glycerin, silicone Dial range: Low pressure: 1 to 70kg/cm2 Middle pressure: 100 to 250kg/cm2 High pressure: 280 to 700kg/cm2Vacuum range: -76cmHg ...