Every Box contains Four Autographs & Three Base Cards! Leaf is proud to add Electrum to its expanding baseball portfolio! 2024 Leaf Electrum Baseball will be leading off another amazing year of Leaf Baseball offerings. Electrum features Leaf’s brand new exclusive micro-etched holofoil technology. Leaf Electrum Baseball will feature some of the best NIL athletes, top prospects, draft picks, superstars and all-time greats from the diamond. 7 Cards per Box.