Backboard Dimensions: 54W x 34H in. made of acrylic3-piece 3.5 round poleScrew Jack adjustable height systemMoves hoop from 7.5 to 10 feet2 struts for mountingHeavy-duty solid steel Arena Slam breakaway rim40-gallon capacity base for water or sandIncludes wheels for ease of portability. Slam dunk your way into the big leagues with the Spalding 54 in. Acrylic Portable Ultimate Hybrid Base Basketball System. Including three pieces and a 4-inch pole this hybrid basketball system features an acrylic backboard that holds a heavy-duty solid steel Area Slam breakaway rim. The four-strut mount provides increased support for every slam dunk and flawless swish. Moving the hoop from 7.5 to 10 feet is the adjustable Screw Jack height system creating multiple levels for your games. Wheels and a 40-gallon base for water or sand complete this must have basketball system.