Lytespan 9175 Miniforms Shallow Ring MR16 track head is made of stamped steel and features 180 degree horizontal rotation and 180 degree vertical rotation. Finish available in Matte White, Matte Black or Metallic Aluminum. Includes electronic low voltage transformer housed in extruded aluminum and tempered glass lamp guard. One 75 watt, 12 volt GU5.3 base MR16 lamp is required, but not included. 2.1 inch diameter x 4.1 inch length. Compatible with Lytespan Basic 1-circuit, Advent 1 or 2 circuit, and Radius 1-circuit track systems.