The Edge Nails are a well-established supplier of professional and affordable nail care products. The Edge Duraboard 180/240 Grit File (x 10) is combined with both medium (180) and fine (240) grit. It is a washable, cushioned file providing a better grip, allowing for more control and faster refinement. Cleaning Instructions: Put nail file under running water and brush the grit surfaces lightly. Do not leave immersed under water for more than 10 minutes. Pat dry and allow to air dry for 24 hours before re-use.