METROLOGY WELL: If you need more depth, the Model 9171 provides 203 mm (8 in) of immersion over temperatures from 30 degrees Celsius all the way to 155 degrees Celsius with full-range stability of plus or minus0.005 degrees Celsius. Just like the 9170, this dry-well has exceptional axial and radial uniformity. The display of the 9171 is calibrated to an accuracy of plus or minus0.1 degrees Celsius over its full range. Insert A, Al-Brnz, Misc Holes, -30 DEG C to 155 DEG C. Includes INSX.