The Monorail 12V 2X250 2-Circuit Straight Kit Surface Magnetic by Edge Lighting Monorail 12 Volt 2X250 2-Circuit Straight Kit with 1 Inch Drop and Magnetic Surface Mount Transformer is available in a 4, 8, 12, 16, 20, 24, 28, 32, 40 or 48 foot length. Finish in Satin Nickel, Antique Bronze or Polished Nickel. Kit includes a 2X250 watt 12 volt surface mount magnetic transformer, straight run of Monorail, 1 inch standoffs for every three feet of rail, and two pairs of end caps. Dimmable with two 600 watt low voltage magnetic dimmers, 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.