The spalding nba platinum helix lift portable basketball system is a quality piece of equipment for playing and practising basketball skills it boasts a transparent acrylic backboard and an arena slam jam ring with a flexible rim suspension for excellent playability and response the pole is tetragonal and three part and the rim height can be changed between 228 and 305cm 90 and 120 using the simple screw jack elevator system the frame is strong made of aluminium weatherproof and stainle