Lifetime 1530 Height-Adjustable Portable Basketball System with 50-Inch Backboard Portable basketball goal system features a 50-inch Shatter Guard Fusion Backboard made of durable, high-density polyethylene Equalizing weights provide optimum rebound performance Black steel HT Power Shock Rim features an advanced pivot point and rear-mounted compression springs for effective shock absorption Gray steel adjustable pole features a friction-welded joint that safeguards against unwanted movement Portable, extra large polyethylene base has a holding capacity of 35 gallons to provide a stable foundation