3M Sanding Screens remove raised wood grain in the final sanding stage and scuffing between finish coats. Silicon carbide bonded to an open mesh for less loading, more consistency and long life. 3M Sanding Screen is a mesh screen with a strong fiber, uniform open construction and consistent cut from start to finish.Mineral coated sanding screenShape : roundColor: brownOpen mesh fabric constructionUse both sides of screen for long lifeRinse and re-use screenUse wet or drySanding screen resists clogging.3M sanding screen uses silicon carbide as the abrasive material and has a diameter of 17 in. 3M incorporates this silicon carbide material into the sanding screen forming a grit of 80.