The U Just unit is an extremely popular unit for game and school use. The U Just system has two U shaped bolts for attaching the board and ring, by adjusting these the board can slide up and down to the pole allowing the unit to be set to any desired height. U Just system allows for any height adjustment up to the official 10ft (3.05m). This must be adjusted by an adult. Durable fan shaped polypropylene backboard measuring 44 inches x 28 inches (112cm x 71cm) with 18 inch solid steel ring (45cm). Ballast required to be filled by 190kg dry sand or 110 litres of water prior to play. Size H345, W112, D90cm. 40kg.