Walthers
Window Awning Set -- 1/2" 1.3cm Wide pkg(12) (195-950)
Used on all types of commercial and residential buildings in the days before air conditioning. Injection-molded window awnings come in five different widths to fit most common sizes of HO scale windows. They're easy to assemble, paint and glue into place. Just fold down the sides and front, apply some plastic cement and you're done! They're sturdier than paper, won't lose their shape and don't require tedious cutting and folding.