The Lifetime Adjustable Portable Basketball System combines durability and versatility for players of all ages and skill levels. Its Shatterproof Fusion™ Backboard features a resilient polycarbonate playing surface paired with an unbreakable polyethylene frame, delivering a professional glass look that stands up to the elements. The Slam-It® Rim, with its 18-in diameter and double horizontal springs, provides exceptional flexibility for powerful dunks and shots. Plus, the innovative Speed Shift® adjustment mechanism allows you to easily change the hoop height from 8 to 10-ft in convenient 6-in increments—all with just one hand. The counterbalance springs do most of the work, making it simple to tailor the height for every player.