DIYHD 75 Bifold Door Sliding Track Hardware, 1 Piece Black Flat Track Top Mount Roller, Kit for 4 Doors(NO Door). Hardware only, not including door panel. Track length 75″, fit max door leaf width 16-3/8″;Thickness: 1-3/8″1-5/8″. Full set hardware including:75 track X1, StopX2, Track&wall connector X4, Floor guideX2, HingeX6, RollerX4. The height from top of the door to the top of the roller is 5 5/16. The gap between door and wall:Door closed:1″1 3/16″;Door opened:1/4″3/8″.