This is a Refrigerator Defrost Heater with Metal Bracket.
There is 1 glass tube heater included and measures 10-1/2" long (just the glass) and from end to end measures 12"
It has a metal shield on it.
It is rated at 725 watts.
Replacement for numbers AP3183311 and PS303781.
This fits specific General Electric manufactured refrigerator models including Hotpoint and RCA