Bimetal Thermometer, Pressure Gauge, Temperature and Pressure Gauge manufacturer / supplier in China, offering 2.5" Dail Size Bottom Connection Diaphragm Pressure Gauge PVC Material, Tridicator Boiler Gauge with Value Thread Brass, 1/2"Bsp, Dial Size 1.5"/2"/ 2.5"/3" Black Steel Case HVAC Gauge and so on.