The Spalding NBA Slam Jam Basketball Hoop and Backboard provides hours of entertaining play for all ages. It makes a fun addition to a dorm room, child's bedroom, game room or other indoor space. This NBA basketball hoop features an 18" by 10.5" polycarbonate board equipped with a steel breakaway rim that measures 9" in diameter. It easily mounts over a door and has padded bracket supports and foam squares behind the board for added protection. This Spalding basketball hoop with mount also comes with a 5" rubber NBA basketball for shootarounds and pickup games.