The 1991 Kellogg's Corn Flakes Baseball Greats 3D Card featuring Ralph Kiner from the Pirates is a collectible sports trading card from the Major League Baseball era. This original card is part of a set of 15 baseball greats cards manufactured in 1991 by Sportflics. The card is made of card stock and includes features like lenticular images. It is a nostalgic piece that would appeal to baseball fans and collectors looking to add a unique and vintage item to their collection.