The Twiggy extension arm comes in two parts to achieve the required height. The elements are attached on the lower side on the main arm and can be changed at any time. It is therefore possible to achieve curve heights of 250 cm and 280 cm respectively in two steps. Adding weights to the shade changes the curve height to 230 cm or 260 cm. The wire of the Twiggy emerges somewhat higher from the shaft and is fed down using the transparent clips supplied to ensure that this change can be made without electrical installation.