The 12V 75W Magnetic Single Feed Direct Feed Surface Transformer converts standard 120V line-voltage to 12V, providing the necessary voltage for powering a low voltage-lighting system and allowing for the closest possible mounting of the monorail to the ceiling All surface mounted transformers are encased in a finished metal housing and mount to any standard ceiling electrical box. The transformer and flexible coaxial feeder cleanly and attractively send power to your system. 36" coaxial feeder is easily shortened in the feeder. Coaxial feeder mimics a solid stem when straight. Offered in bronze or satin nickel, in 120V or 277V. Compatible with a 600W magnetic low voltage dimmer. Intended for use with LBL LED Illuminated Monorail Systems only. Material: Metal Dimensions: 5.1"D X 4.25"H Lamp Type: LED