Detailed Product Description Angular board type thermometerRange:-50~+600 celsius degreeSize: 2-1/2", 3", 4", 5", 6", Stem diameter: normal 6.3mm or according to customers orderStem length:63~150mmInlet thread: 1/4", 3/8", 1/2", NPT ,BSPT, BSP or according to customers orderLens: V shaped aluminum or ABS scale with black figures, lens front, red or blue reading mercury or kerosene filled tube. ...