FWS Schaefer KK39ZA Thermocouple Pipe Well 18"x 21" Ceramic 90° Elbow 1/2"NPT

New old stock, has some rust from storage.
Ceramic Covered Element Thermocouple.
1/2"x 18" Vertical Pipe with 21" elbow pipe 1-1/4" Dia Ceramic Tube.
1/2" NPT thread size.