Does he mean exposed inside the crucible?
I could't help but wonder myself. I have never seen a pot with heating elements on the inside.
I have a LEE 20 lb pot and the heating elements are contained inside a double shell crucible. Nothing having anything to do with any heating element is exposed inside. When empty all you see is a smooth surface with the leaking bottom pour valve assembly
I load, 9mm Luger, 38 and 40 S&W, 38 Special, 357Magnum, 45ACP, 45 Colt, 223, 300 AAC, 243 and 30-06