This product is a lot of three vintage Pyrex blue and teal glass airport runway signal lenses, specifically models MS 24489 and MS 24502. These lenses are likely to be collectible items for those interested in transportation and railroadiana, as well as for pyrex enthusiasts. The unique blue and teal colors of the lenses add to their appeal and make them stand out as aviation-themed hardware pieces. Perfect for collectors or restoration enthusiasts looking to add a piece of history to their collection.