Johnson Hardware 200SD 2-Door Bypass Hardware Set, 72 in. Tracks (Doors Weighing Up to 300 lbs. each) HEAVY DUTY HARDWARE - Top-hung hardware system designed to carry heavy doors. SPECIFICATIONS - For doors 1-3/8 to 1-3/4 thick, weighing up to 400 lbs. SOLID MATERIALS - Heavy duty extruded aluminum I-beam tracks. Corrosion-resistant plated steel components. ADJUSTABLE - Includes height adjustable ball bearing door hanger with quick release clip. MADE IN USA - Manufactured in the United States.