A single feed canopy is mounted to the ceiling above the Monorail run. It brings power to the Monorail run from a single feed remote transformer (sold separately). The low-voltage leads from the remote transformer are connected to the canopy leads inside the electrical box the canopy mounts to the electrical box. 4 inch round canopy mounts to a standard 4 inch electrical box with round plaster ring (not included). Finish available in Satin Nickel or Antique Bronze. ETL listed. 4 inch x 2.5 inch height x 4 inch length.