What are these?

[shell70634]

These were in a box of bullet master parts but I don't think they belong. Might some kind of temperature switch or sensor. They're about 4x10 inches. Both are exactly alike.
227664

[rancher1913]

they are some kind of heater, the round thing in the middle is a high temp safety.

[JimB..]

Wonder if it is for preheating ingots?

[Hardcast416taylor]

Wonder if it is for preheating ingots?


I have used an old flat cast iron skillet sitting on an old 2 burner electric cook top set on low heat, for many years.Robert