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 (3.05m). A mobile base of the unit requires 190kg (418lbs) of dry sand or 110 litres (24.2 gal) of water to provide sufficient stability.