The product is a signed 1988 Fleer Tom Glavine rookie card #539, authenticated by Professional Sports Authenticator (PSA) with a perfect 10 grade. This highly collectible item features the legendary pitcher's signature, making it a valuable addition to any sports memorabilia collection. As a key piece from Glavine's rookie season with the Atlanta Braves, this card encapsulates a piece of baseball history and is sure to be a prized possession for any fan or collector.