The 1991 Upper Deck Baseball Team Insert Cards set includes all 26 MLB teams, along with additional cards featuring various players and events from the 1991 season. Made of card stock and manufactured by Upper Deck, these original sports trading cards are a vintage collectible item for baseball fans. With a standard size and English language text, these cards showcase the MLB World Series tournament and offer a unique glimpse into the baseball world of the early 1990s. Each card is authenticated by Upper Deck and represents a piece of baseball history from that era.