Simple 2 pole dome sets up in seconds. • Walls made of a durable polyester and floor made from polyethylene for years of play. 36 colorful plastic balls. SPECIFICATIONS Dimensions 4' x 4' Interior Height 38'' Pole Material  6.5mm fiberglass Floor Material  Polyester 170T 600mm P.U. Wall Material  Polyester 170T 600mm P.U.