Two half circles connected by two metal rods. Nothing more and noting less. Rotate and position the shade as you like. It's like a geometric play object. How nice to have something functional being so pretty and playful at the same time. Use them on your desk or even as a bedside lamp. As simple as they look, they are well made of white lacquered metal (no plastic). These 1980's halogen lamps are quite rare. The model is called "Laser" produced by Bilumen, Italy. This a great opportunity to buy a matching pair, but they are sold seperately too.
