Name: American Specialty Glass. Descripton:American Specialty Glass (ASG) is the premier manufacture of fireplace and fire pit glass in the United States. All ASG Products are manufactured from 100% recycled material, gathered throughout the Western U.S. and diverted from local land fills. We strive for excellence in our manufacturing process and offer unparalleled customer service. Located in North Salt Lake, Utah, ASG operates several glass-melting furnaces and colors the glass using proprietary methods and formulations. This allows ASG to provide dozens of varying colors and sizes to meet any desired look. ASG has a proven track record of supplying some of the largest fireplace and fire pit manufacturers in the world, including Lennox Hearth Products, Kingsman Fireplace, Napoleon, and many more.