Spalding 88307H In-Ground Basketball System with 52-Inch Polycarbonate Backboard 52-inch polycarbonate backboard with heavy-duty steel frame and in-ground base Helix height adjustment system with pushbutton adjustment between 7.5 to 10 feet 3-piece, 3.5-inch diameter pole system; ground sleeve for easy installation 5/8-inch solid-steel Pro-Slam breakaway rim with all-weather net Powder-coated matte black finish; 8-year limited warranty