... 2. for refrigeration and hot water 3. Zinc plated steel case 4. Dial size 2.5", 3" and 4 Bimetal thermometer, Model ... industry, HVAC use, especially for refrigeration and hot water.Specification:Dial size: 63, 80, 100mmCase: Zinc plated steelBezel: Zinc plated ... alloy, adjustable at endPocket: Brass, friction at axial of thermometer case, fixing by screw for optionPocket length including thread: 50, ...