Boasting an art deco aesthetic, the Pleasant Hearth Alsip Fireplace Glass Door Collection is a beautiful, black, cabinet style, one-piece frame. When installed, the fireplace glass door enhances the appearance of your family's indoor, wood-burning, traditional masonry fireplace hearth. All Pleasant Hearth Fireplace Glass Door sets are designed for masonry fireplaces only and are not compatible with prefabricated fireplaces - see our sizing guide for more details: (link to the FGD sizing guide on our site/reference its location for retailers)When it's time to unwind from the day, glass door set opens completely, providing a clear view of your burning fire. The clear 3/16-in tempered glass doors must stay open while the fire is burning, and the built-in mesh firescreen panels act as a barrier to help contain embers. Both the glass doors and mesh panels have easy-catch magnets to help keep them closed.The glass doors can help you save energy year-round - when closed, they prevent AC and heat loss through the chimney by up to 90%. The hidden damper knob at the bottom of the firescreen provides additional air flow to feed the fire for bigger, longer-lasting flames. Closed fireplace glass door sets also prevent cold chimney downdrafts from entering your home and keep pets and children out of fireplace soot. Size: large.