The sure shot 510 u just portable unit is perfect for home and school use its durable fan shaped polypropylene backboard measuring 44 112cm by 28 71cm is fitted with an 18 steel ring with a net and connected to a heavy duty pole the unit features two u shaped bolts that attach the board and the ring to the pole and allow for any height adjustment up to the official 10 305m a mobile base of the unit has to be filled with 190kg 418lbs of dry sand or 110 litres 242gal of water