The sure shot 510 u just portable unit is ideal for home and school use it consists of a durable fan shaped polypropylene backboard measuring 44 112cm by 28 71cm an 18 steel ring with a net and 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 requires 190kg 418lbs of dry sand or 110 litres 242 gal of water to provide sufficient stabi