JUBEST 68 Bi-Folding Sliding Barn Door Hardware Track Kit, Heavy Duty Side Mounted Black Roller for 4 Doors, Smoothly & Quietly, Easy to Install (No Door Included). SUPERIOR QUALITY: Sliding bifold barn door hardware is made of high-quality carbon steel with frosted black surface. All nylon wheels have been tested beyond 100,000 rolls, ensuring smooth and quiet sliding. PRODUCT DIMENSIONS: Track length: 68. The track length should be door opening size + 4″ (100mm), at least 5-3/8″ clearance needed from top of door to ceiling, fit max door leaf width 16″, fit door thickness: 1″1-3/4. Door weight capacity: 360 LB. PACKAGE INCLUDED: 2x 2.8FT Rails, 4x Rail Spacers, 4x Rollers, 4x Roller Brackets, 2x Fixed Connectors, 2x Floor Guides, 3x Hex Key, 2x Sealing Strip. PLEASE BE ADVISED THAT THERE IS NO DOORS INCLUDE. EASY TO INSTALL: We provide step-by-step graphic and text instruction. All measurements in inch. It is very easy for you to take a reference during the installation. Our engineering team is composed of experts.