The ATK series is an extruded aluminum track for use with A-Line track fixtures. Features:• EXTRUSION: Constructed of 0.06" extruded aluminum with 0.045" PVC bus bar support holding 12 gauge round bus bars. Polarity groove is located on face of track to indicate location of grounding conductor.• ELECTRICAL: Single circuit power distribution system designed to supply lighting unit flexibly. Single hot and neutral conductors are rated for max. 20 Amps. Copper electrical conductors are concealed in thermo-plastic, low-profile track section.• COMPATIBILITY: Track system is compatible with all A-Line® and Juno® style track fixtures, accessories and connectors.• MOUNTING: This track is surface mounted using the supplied mounting hardware.Labels cULus listed.