Nora Track Light NT-317B - Black - Track Adapter - Single or Dual Circuit - Compatible with Halo Track (2 Black Adapters) Allows a pendant to be suspended from track system. Includes strain relief and supports up to 10 lbs. Compatibile Track Systems: One-Circuit or Two-Circuit Track. Finishes: Black. Dimensions: 1.42 W x 1.42 L x 2.1 H.