Glass Max Adjustable/Portable Syst Infinitely variable goal height adjustment is perfect for youth basketball.
Features and specs:

• Superior 36" x 54" competition glass backboard
  
• Competition breakaway goal
  
• Adjusts from 5' to 10' high with smooth hand crank height adjustment
  
• Easy-to-read height indicator
  
• Ballast box holds up to 600 lbs of ballast (not included)
  
• Non-marking wheels
  
• Collapsed unit measures 128" L x 51" W x 78" H
  
• Weighs 700 lbs.