This is a new old stock element, it has been in storage for decades and may be a little crusty. The picture was taken on top of a 1X1 inch grid so that you can easily see exactly what the dimensions are.

HEATER 

Manufacturer: Frigidaire 
Part Number: Q000210821

Works with the following brands: Frigidaire, Gibson, Kelvinator, Tappan, Westinghouse, Electrolux, Kenmore, Uni.