The 1990 Collect-A-Books Baseball Series 1 Box #3 is a sealed box containing 12 baseball trading cards featuring iconic players such as Jose Canseco, Lou Gehrig, and Roberto Clemente. These booklet-sized cards are made of paper and are part of the base set for the 1990 MLB season. The box includes cards from various teams like the New York Yankees, Boston Red Sox, and Oakland Athletics, making it a sought-after item for baseball card collectors. This vintage sports trading card set is a nostalgic piece of baseball history from the United States.