The only portable system of its size, this hoop gives you the stability of an in-ground, but with a wheeled base that makes it easy to move. The 60″ glass backboard gives you the true rebound you’d find on the professional court. It has a sturdy steel rim that can handle fierce dunks and drives, and you can adjust the height of the rim to anywhere between 7.5 feet and the league-standard 10 feet. This hoop gets its stability from a two-piece 5″ square steel pole. It rests on a 55-gallon base equipped with 4 wheels, so you can move it down the driveway without having to tilt the whole system forward.Spalding the Beast 7.5ft – 10ft Adjustable Height 60″ Glass Portable Basketball System (Adult) Portable Basketball Hoop System Backboard Size: 60 inches Tempered glass board for enhanced durability 1 inch x 2 inch steel board frame with aluminum trim Height adjustable from 7.5 feet to 10 feet Screw Jack lift mechanism for easy height adjustment Base fills with 55 gallons of water or sand for stability Base dimensions: 62.9 inches x 36 inches x 14 inches Equipped with four wheels for easy mobility Designed for outdoor residential play Packaging dimensions: 70.28 inches x 41.50 inches x 27.75 inches