The product is a single original postcard featuring the eruption of Mauna Loa volcano in Hawaii. The postcard was created in the photochrome era, showcases a standard size of 5.5 x 3.5 inches, and is unposted. It was made in the United States and is not personalized nor signed. This postcard captures a significant event in the history of the volcano and is a valuable collectible for those interested in natural disasters and geological phenomena.