Spalding® Slam Jam® Over-the-Door Mini Hoop easily mounts over most door Features an 18" x 10-1/2" (45.7 x 26.6 cm) padded polycarbonate board Equipped with a 9" (22.8 cm) diameter steel breakaway rim Padded bracket supports and foam squares behind the board for protection Includes a 5" (12.7 cm) rubber basketball and assembly tool No court, no problem. This over-the-door unit lets you sink shots from your office chair or living room couch. A quarter-scale replica of the official backboard, it has a clear, durable board and steel breakaway rim.