These drop rods are for use only with the Henley Aeolus fans. Drop rods are often called extension, down pipe or down rods. They are important as they bring the ceiling fan down to the correct height for the correct and efficient operation which is about a meter above head height. The length of the drop rod will be determined by the ceiling height and the drop of the fan. If your ceiling is above 2.8m/9.2 ft then the length of drop rod that needs to be added will be whatever is needed to keep the fan at a 2.8m/9.2 ft height. A ceiling fan will still work even if it is higher than this but will loose some of its effect. If the fan blades are properly balanced then there should be no wobble even with a long drop rod.
They are available in brushed chrome and rubbed bronze in 24″/61cm and 47″/120cm lengths. These can be cut down to the required length.