The sure shot 514 portable telescopic basketball unit with acrylic backboard is a mobile full size basketball system approved by england basketball and basketball scotland its backboard is made from durable transparent acrylic and fitted with an 18 45cm steel ring it is connected to a 3 8cm in diameter telescopic pole that adjusts easily between 8 244m and 10 305m in height the mobile base of the unit requires 190kg 4188lbs of sand or 110litres 242gal of water as a balla