The Halo Miniature size, decorator finishes, push-in connectors, Economy, all combine to make single-circuit Miniature Track perfect for residential or commercial use. To ensure safe operation the entire track system is fully polarized and grounded. Miniature Track is available in six finishes to meet any decorating need: White, Matte Black, Antique Brass, Polished Brass, Bronze and Silver. L's, T's and X's allow track to be assembled in almost any pattern. Solid copper buss bars encased in rigid extruded PVC insulators. Polarized connectors and end caps are molded polycarbonate. Electrical capacity is 20 Amps. Structural: Extruded aluminum.060" [1.5mm] nominal wall thickness Line Conductor: Solid copper bus bars [cross section equivalent to #12 AWG wire]. Insulating Liner: Extruded polyvinyl insulator. Ground Conductor: Exclusive independent grounding bus conductor. Maintains an independent positive ground #12 AWG path between lamp holder, Track channel and building?s ground system. Neutral Conductor: Cross section equivalent of #12 AWG wire. Polarity Indicator (Neutral): Visual polarity groove indicates proper electrical installation of lamp holder adapter. Listings: callus listed for use with Halo and Laser-by-Halo lamp holders.-Class IIIA laser; 5mW or less