The product is a 1988 Fleer Baseball Edgar Martinez #378 Rookie Autograph trading card that has been authenticated by both CGC and JSA. This card features an autograph from the Seattle Mariners player, making it a valuable collectible for fans of Major League Baseball and sports trading cards. With its rookie designation and authentic autograph, this card holds significance within the baseball card market and is a sought-after piece for collectors looking to add a piece of sports history to their collection.