Bi-fold style doors with 3/16-Inch tempered safety smoked glass, premium rigid mesh panels,premium-quality hinges, and easy-catch magnets Includes a 2-Inch riser bar riser bar included but not assembled For masonry fireplaces only and not for use on pre-fabricated fireplaces Dimensions: 37 ½" W x 33" H Fits Opening Width: 30" ~ 37" || Fits Opening Height: 25 ½" ~ 32 ½" The Pleasant Hearth Clairmont Classic Black Bi-Fold Style Glass Fireplace Doors enhance one’s traditional masonry fireplace and help reduce heat and cool air loss up the chimney by as much as 90% while the fireplace is not in use for year-round energy savings. This fireplace door surface mounts outside the fireplace opening feature: bi-fold style doors, premium/fine mesh panels, smoked 3/16 in. safety tempered glass, 1-piece frame construction with a high heat powder coated finish for looks and durability. Easy to install, fully assembled. For masonry fireplaces only, not for prefabricated. Before you buy, get the right fit: measure the front opening width and height to the nearest 1/8 in.