Spalding NBA In-Ground Basketball System - 48" Polycarbonate Backboard 48 x 32 steel framed polycarbonate backboard. 2.5MM thick polycarbonate backboard for exceptional durability. Pro-Glide lift system adjust rim height from 7.5 to 10 in 6 increments. Three Piece, 3.5 round steel pole allows for maximum stability. Ground sleeve anchor system allows for easy installation. Backboard has 16 offset from pole Slam Jam breakaway rim and authentic style blow-molded backboard pad included