The product is a 1980-81 Topps basketball trading card set featuring Julius Erving, Dan Roundfield, and Ron Brewer. This card set includes players from the Philadelphia 76ers and Atlanta Hawks teams in the National Basketball Association (NBA). The card numbers included in the set are 258-181-3, and it is a part of the base set produced by Topps for the 1980-81 season. This collectible item is a valuable piece for fans and collectors of basketball trading cards, especially those interested in iconic players like Julius Erving.