The NBA Mystery Box features a randomly chosen graded slab from top sports grading companies like Beckett, CGC, and PSA. Each box contains 1 standard-sized basketball trading card featuring players like Stephen Curry, Giannis Antetokounmpo, LeBron James, and Michael Jordan. These cards are original and made of card stock, representing teams such as the Chicago Bulls and Los Angeles Lakers. The set varies and includes features like base cards, exclusive inserts, rookie cards, and parallels, making it a desirable collectible for basketball fans and collectors alike.