This part is for the panel door Lumie, Labeet. This is a rail that mounts under the door. There are 3 types of gliders (protrusions) including S, M, and L. S: Floor and Door Bottom Gap for 0.7 - 0.9 inches (1.9 - 2.4 cm); M: Floor and Door Bottom Gap 0.9 - 1.1 inches (2.2 - 2.7 cm); L: Floor and Door Bottom Gap 1.2 - 1.2 inches (2.6 - 3.1 cm). Colors: White, Natural, Dark Oak, Black Ash, White Ash.