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