For door panels 1" to 1-3/8" thick, weighing up to 30 pounds each. Zinc-plated steel. Spring loaded top pivot and roller guide for easy installation. Permanently lubricated roller guide. Durable pre-painted track. Conforms to ANSI A156.14 type D8622. Includes 1 white steel track, 2 bottom pivots, 2 top pivots, 2 guide wheels, 2 pr. hinges, 2 knobs, pr. aligner, jamb mounting bracket, and offset hole non-mortise hinges. With screws - Boxed.