The Monorail 12V ELV Circle Kit 300W Surface Electronic by Edge Lighting Pre-Bent Monorail 12 Volt 300 Watt Surface Mount Circle Kit is available in a 24, 36, 48, 60, 72, 84, 96, 108 and 120 inch diameter. Finish in Satin Nickel, Antique Bronze or Polished Nickel. Kit includes a 300 watt 12 volt surface mount transformer, circle of pre-bent Monorail, 1 inch standoffs for every three feet of rail, and conductive and isolating connectors. Dimmable with a low voltage electronic dimmer, sold separately. Fast Jack 12 volt pendants and heads available, sold separately.