CCJH 3FT/36Inch Bifold Barn Door Hardware Kit, Sliding Barn Door Hardware, Top Mount Rollers, BlackSUPERIOR QUALITY: The bifold barn door hardware kit is made of high quality carbon steel with frosted black surface, rust resistance and durable, can maintain its beauty and longevity for many years TRACK SIZE CHOICE: This 3FT 3inch track fit max door panel width 16. 97inch. Each door panel should be half the size of the door opening + 50mm 1. 9inch and the track should be more than 150 mm inch wider than the door opening STABLE AND QUIET: The roller