26813BK Finish: Matte Black, Size: 12 Features: -Feed track.-Structural aluminum extrusion; average wall thickness 0.08".-"U" shaped copper conductor, increases contact surface area minimizes contact resistance provides reliable positive connection.-Heavy duty steel. For mounting track by cable.-Reversible wing brackets accommodates 0.5" or 0.63" gypsum board. Includes: -Molded thermoplastic, included with all track connectors. Options: -Available in Matte Black or Matte white finishes.-Available in 47.63" Width, 95.63" Width, 143.63" Wide size. Specifications: -2V PAR 56 20W to 240W with screw terminals. Dimensions: -0.040" wall, high temperature extruded thermoplastic.-Electrical module built-in. Feeds power to track. May be field cut. 0.88" dia. knockout accepts 0.38" or 0.5" electrical connector.-4" Width dimensions: 1.69" H x 47.63" W.-8" Width dimensions: 1.69" H x 95.63" W.-12" Width dimensions: 1.69" H x 143.63" W.