External Compression Height Adjustment Mechanism allows rim height to raise and lower 6" to 10" * Backboard is 42" x 72" and made of 3/8" competition fully-tempered glass mounted on an exclusive H-Frame design made of 1-1/2" structural steel tubing to provide precise and consistent ball response * Corrosion-Resistant paint process of one primer coat and two coats of baked on acrylic-enamel provides a high-gloss finish * 3 ft Extension from wall to front of backboard.