Application: This kind of industry bimeter thermometers has a pointer at the center of the screen,which can check the max temperature arising during the day,the pointer is very sentive to show correct temperature. Case:304 Stainless Steel Ring:304 Stainless Steel Window:Glass Stem & Connection:Stainless Steel Pointer and Dial:Aluminum Range:-40-600-500 Accuracy:1.6% Mounting Type:Back