The product is a vintage Kopp Glass yellow glass lens measuring 5 3/8 inches, specifically designed for railroad lanterns. Made in the United States, this collectible item is a piece of transportation history that would be a valuable addition to any vintage railroad or lantern collection. The high-quality craftsmanship and unique design of the product make it a sought-after item for collectors and enthusiasts interested in railroadiana and vintage hardware. Photos are part of description. Please feel free to ask questions.