"This Pleasant Hearth Grandior Fireplace Glass Door reduces heat loss up the chimney by 90 when the fireplace is not in use, plus add style and function. When you're not enjoying a fire, simply close the clear tempered safety glass to minimize heat and cool air loss. This handsome accessory features a high-temperature antique brass powder-coated finish and easy-grip 4in. door handles. Fits masonry fireplace openings 30in. to 37in. wide and 22 1/2in. to 29 1/2in. high. For masonry fireplaces only. Not for use on pre-fabricated fireplaces. U.S.A. Fits Opening W x H in. 30 to 37 x 22 1/2 to 29 1/2, Style Grandior, Finish Type Antique Brass, Dimensions W x D x H in. 37 1/2 x 1 7/8 x 30. Reduces heat loss up your chimney by 90 when the fireplace is not in use Cabinet style doors with premium-quality hinges and easy-catch magnets fully open to provide a full view of your fireplace Premium welded metal mesh panels 3/16in. beveled clear tempered safety glass 4 3/4in. bay-style welded frame construction Simple do-it-yourself installation"