The Chesterfield Fireplace Screen by Residential Retreat with Bi-Fold Smoked Glass Doors in Black finish mounts outside the fireplace opening to provide a more attractive look and reduce heat and cool air loss by as much as 90%. It features premium mesh panels, tempered safety glass, and a one-piece frame that installs in three easy steps. Not for prefabricated fireplaces, masonry only. Made in the USA