Ultra Furnace EXED01A Thermocouple Pipe Well 18"x 20" Concrete 90° Elbow 3/4"NPT

New old stock, has some rust from storage.
Cement Covered Element Thermocouple Elbow.
3/4"x 18" Vertical Pipe with 20" elbow Thermocouple 2" Dia Concrete Tube.
3/4" NPT thread size.