Packaging List : 2*3.75ft Tracks : Surface sprayed with black powder coating to enhance wear resistance and look beautiful. 6*Fixed Seats : Used to adjust the distance between the door and the strong. 4*I-Shape Rollers : Roller Material: Nylon. Bearing Material: Stainless steel. Rollers can slide smoothly on the track to reduce noise. 4*Door Stoppers : Prevent the door from sliding down the track. Use rubber cap to achieve anti-collision and silent effect. 4*Anti-jump Pads : Prevent your door from lifting off the track. 2*Floor Guides : Prevent the door from swinging and ensure smooth sliding. DOOR NOT INCLUDED Warm Tips: 1. The track length is at least twice as long as the doorway. 2. At least 6" of space from the top of the door to the ceiling. 3. If the door opening is with trim, you need to mount a board onto the wall and then attach the rail onto the wooden board. 4. If you have any questions about it, please contact us FIRST, our professional customer service team will solve it within 8 hours. We are happy to solve the problem for you.