Features: 1) Bimetal thermometer with brass thermowell 2) Dial: 2.5" (63mm) dial, aluminum 3) Case: ... Features:1) Hot water thermometer with brass thermowell2) Dial: 2.5" (63mm) dial, aluminum3) Case: steel plated ... ) Stem: brass, diameter: 9mm, length: 40mm, 60mm, 80mm, 100mm, 160mm 7) Connection: center back, with 1/2" BSP brass thermowell8) With adjustable zero ...