Spalding NBA in-Ground Basketball System 54 x 32 steel framed glass backboard with aluminum trim. 1/4" thick tempered glass backboard for superior rebound. U-Turn lift system provides infinite height adjustment from 7.5' to 10' Two Piece, 4 Square steel pole allows for maximum stability. Ground sleeve anchor system allows for easy installation. Backboard has 2' offset from pole.54 inches glass basketball system has a 4 inches square steel PolePro image breakaway rim Pro-Image Breakaway rim for recreational level of performance