The product is a 1956 Topps Sandy Koufax #79 Gray Back trading card from the Brooklyn Dodgers, graded as a PSA 4 VG-EX. This vintage baseball card features the legendary Major League Baseball pitcher and is part of the base set manufactured by Topps in 1956. It is a highly sought-after collectible for fans and collectors of sports trading cards, especially those interested in baseball memorabilia from the Brooklyn Dodgers era.