This product is a 30-card lot of original sports trading cards featuring Don Mattingly, a former player for the New York Yankees in Major League Baseball. The cards are from the 1987 Donruss set and manufactured by Donruss in the United States. The cards are made of card stock and are in standard size. The lot includes cards from Topps, Upper Deck, SP, and Donruss, among others, and does not contain any duplicates. The cards are in English and would be a great addition to any baseball card collection.