The Monorail 12V 4X300 2-Circuit Circle Kit Remote Magnetic by Edge Lighting Pre-Bent Monorail 12 Volt 4X300 2-Circuit Circle Kit with 1 Inch Drop and Magnetic Remote Transformer 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 two 2X300 12 volt 2-circuit remote magnetic transformers, 4 inch round dual 2-circuit power feed canopy, circle of Monorail, 1 inch standoffs for every three feet of rail, and isolating connectors. Remote transformer needs to be located in an accessible area in close proximity to the power feed canopy. Dimmable with four 600 watt low voltage magnetic dimmers, sold separately. Some buzzing may occur on low levels and may be reduced with four dimming de-buzzing coils (TBD-300), sold separately. System not dimmable when one circuit uses halogen fixtures and the other circuit uses LED fixtures. All other combinations are dimmable. Fast Jack 12 volt pendants and heads available, sold separately.