Also known as a mooring noray, these are short columns with rounded tops that are fitted to the edge of docks. AISTER bollards are manufactured from marine-grade corrosion-resistant aluminium alloy and come in two models (BL-15 and BL-20), designed to be installed on concrete docks using Hilti expansion joints or chemical anchoring with a threaded rod. With breaking loads of 15 and 20 tonnes, the models are designed to withstand the docking of large ships. All our bollards undergo polyester resin treatment, allowing customers to choose the colour of the accessories for their marina.