pleasant hearth an-1010 alpine fireplace glass door, black, small pleasant hearth this alpine 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 classic black powder-coated finish and easy-grip 5in. door handles. fits masonry fireplace openings 30in. to 37in. wide and 22 1/2in. to 29 1/2in. high. <b>for masonry fireplaces only. not for use on pre-fabricated fireplaces.</b> u.s.a. finish type: black, dimensions w x d x h (in.): 37 1/2 x 1 7/8 x 30, fits opening w x h (in.): 30 to 37 x 22 1/2 to 29 1/2, style: alpine