Spalding In-Ground Basketball System with 54-inch Steel Framed Glass Backboard Residential in-ground basketball system easily adjusts rim height from 7 to 10 feet Tempered glass backboard, measures 54 x 36 inches (0.375-inches thick) Pro-Image breakaway rim with heavy-duty wraparound support One-piece steel square pole--six inches square, made of 11-gauge steel Authentic Arena View main court backstop look with four-corner Z-Arm mount