Stone Age Fireplaces are composed of specially engineered materials to give the owners many years of low-maintenance, worry-free use. These outdoor fireplaces are UL-127 tested and approved to provide our customers with the satisfaction that they have a durable product that will add value and comfort to their homes. Stone Age Manufacturing's outdoor fireplaces come packaged as kits in three different sizes 24, 36, and 48 inch designations. This measurement refers to the width of the opening of the firebox on each model. Additionally, we carry a 36-inch see-through fireplace. Each of these models is customizable with the option of an arched or straight top opening over the firebox and can be used for wood burning or gas burning logs. Build outdoor fireplaces wtih designs from Brock White. These outdoor fireplace products are available in Brock White's Brainerd, St. Cloud, Duluth, Rochester, Elk River, Eagan, Green Bay, Appleton, and other US Brock White locations.