Double Individuals Long Black Knot Free Naturals Eye Lashes By Ardell Professional, This individual lashes long black have twice 2X the number of lash fibers per individual cluster and are perfect for lash wearers who want to customizes their eyes with thicker lash volume. Contain 20 strands of lashes per individual lash cluster compared to 10 strands in the regular knotted ones for more dramatically intense eyes. Knotted at the base for easy application.