80p "Concrete" Perimeter Foundation - Fits 80% Model

"Concrete" foundation option. 5" diameter, ~1/4" height. Includes application of a grayish coating which mimicks concrete texture.   Used to represent the original perimeter foundation as observed in Drain, Oregon, upon which that burner sits on top. 
     As a separate option, I offer a plain grey foundation without the "concrete" coating. I have made this a separate product, so please find that adjacent to this one.