Spalding NBA In-Ground Basketball System - 44" Polycarbonate Backboard 44 x 30 steel framed polycarbonate backboard. 2MM thick polycarbonate backboard for exceptional durability. Ratchet lift system adjust rim height from 8 to 10 in 4 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. Made from polycarbonate materials Slam Jam breakaway rim included for recreational level of performance.