* Heavy-duty, solid steel Slam Jam breakaway rim with steel rams * Rim height adjusts from 7.5 to 10 feet in height * Ground sleeve allows for easy assembly and removal About Spalding Founded by Boston Red Stockings pitcher A.G. Spalding in 1876, Spalding has been developing innovative products ever since. From creating the first American football, to producing the first basketball for Dr. James Naismith, to their latest advances in INFUSION technology (balls with built-in pumps), Spalding has been on the cutting edge of the sporting goods industry for well over a century. True to A.G. Spalding"s vision, the company has delivered quality goods that reflect a commitment to workmanship in every finished product, every step of the way. * 48-inch steel frame, polycarbonate backboard * Square corner, 1-inch-thick backboard frame * Authentic style board pad * Pro Glide lift system * 3-piece, 3.5-inch-diameter pole system * Ground sleeve for easy assembly