Starter units easily extendible with add on bays.Robust design with cross bracing between uprights.Curved bases to prevent tyre damage.Bolted arms for strength.All uprights 2000 mm high.Two unit widths available 900 mm and 1500 mm.2 arm lengths available up to 1200 mm long.Single sided starter bays have 3 arms per column - 6 in total.Double sided starter bays have 6 arms per column - 12 in total.Single sided add on bay has 3 arms per column.Double sided add on bay has 6 arms per column.