Spalding 68454 NBA Tempered Glass 54-Inch Screw Jack Portable Basketball System: * 54" heavy-duty, 1/4" thick, 1"x 1", steel-framed, tempered-glass backboard * Arena-style aluminum board trim and board pad for durability * Structural steel H-frame board brackets * Four-point welded Z-arms board mounts provide increased stability and goal reinforcement * Arena Slam rim with wrap and spring cover * Screw Jack Lift provides infinite height adjustment from 7.5" to 10" * Three-piece 4" square pole with four strut mount for increased system support * Spalding Portable Basketball System has a 40-gallon base