The product is a 2010 US Census Sprint Cup postcard featuring NASCAR racer Greg Biffle, signed by Biffle himself. This original trading card is a collectible item for fans of racing and NASCAR, specifically showcasing Biffle's autograph. Although the autograph authentication is not provided, the authenticity of the signature can be verified through the known association between the player and the item. This unique piece of memorabilia would be a valuable addition to any sports memorabilia collection or fan's display.