B1172605 flame sensor. 

THIS WINTER DON'T GET
CAUGHT OUT IN THE COLD.
$$$ SAVE MONEY $$$ BUY a 2 PAK!!

This flame sensor measures a hair over 5".  It has a bend
(about 25 degrees) in the rod 2 1/2" from the base.

Fits Models GUS, GUS050-2, GUS075-3,
GUS100-4, GUS125-5