The1529 Portable Basketball Goal System features a large 50-inch Shatter Guard fusion backboard that is made of Makrolon polycarbonate, making it virtually unbreakable and many times stronger than acrylic. The black hammertone steel, three piece, three inch round quick-adjust pole system allows you to lower the rim height from eight to ten feet in six inch increments. Players of any age or skill can enjoy the game at their level. The orange Slam-It rim features double compression springs that provide spring-back action. This system is built for competitive play with welded-steel net hooks and an all-weather nylon net. And the 27-gallon portable base fills easily with water or sand to provide a stable foundation, and rolls easily on its own wheels to your desired location.