REGULATION SIZE: The height-adjustable pole moves between 7.5ft and 10ft settings, so you can enjoy two styles of play; one for relaxed practice and one for regulation-size competition BASE GEL POWDER INCLUDED: A bag of simple, absorbent gel powder replaces and outperforms lone water or sand; just combine the gel powder and water in the base for maximum stability LARGE BACKBOARD: A 44in shatterproof polycarbonate backboard encourages high-rebound action and is weather-resistant to handle the most intense outdoor competitions DUNKABLE RIM: Spring mountings in the rim and backboard are ready to absorb the impact of players working on their dunk game PORTABLE SYSTEM: Two built-in wheels with a hollow base makes this system easy to move so you can find the perfect spot in your backyard, driveway, or sidewalk