Commercial series antennas are constructed from Grade 6000 series aluminium. Corrosion resistance is increased by silver finished anodising. Elements are 12 x 1.4mm extruded sections, which provides a robust antenna. The boom section is 25 x 25 x 1.7mm square
tube, to which the driven element is clamped. The parasitic elements are fitted through the boom and fixed with aluminium rivets.