Small Space First Choice: 48" Splicing track; bifold barn door hardware kit won't take up too much of your living space.The track length should be doorway size +4"or more; Fit door thickness:1-3/16" ~1-3/4";Door weight capacity: 330lb. Easy Install: We provide a step-by-step bifold barn door hardware installation parsing manual,and you can also get a "Video Installation Guide" and "Upgraded Installation Copy" from our online service. Excellent Product Quality:BONIKLUBA Bi-folding barn door hardware kit is made of high quality carbon steel, not easy to be bent and deformed, and the roller part is made of high quality nylon, so that the roller is as quiet and smooth as butter when sliding over the guide, which is the first choice of strong and durable hardware kit. Packing List: (2)Rollers; (48")Splicing Guide; (1)Rotating Shaft/Floor Guide; (3)Folding Hinges; All parts required for bifold barn door hardware kit installation. NO DOOR PANEL. 24 Hours Support: BONIKLUBA has a professional customer support team. Please let us know, if you encounter any questions or troubles, we will actively answer them for you. 8" track; bi-folding barn door hardware track kit won't take up too much of your living space.The track length should be door opening size +4"or more; Fit door thickness:1-3/16" ~1-3/4";Door weight capacity: 330lb.