Fireglass Fireplace Fire Pit Glass, ~1/4" Copper Reflective, 40LBS "Reflective" fireglass is tempered glass with one side metallic/mirror-coated Highest quality fire-glass on the market Products made by Fireplace Glass San Diego are sold only by Fireplace Glass San Diego Package includes 40 lbs of ~1/4" Copper Reflective Fireglass This glass has been tested and will not melt or discolor, if properly installed and used