Vaniman 97931 Walnut Shell Sandblasting Media 20/40 Grit “ 50 lbs.Vaniman 97931 Walnut Shell abrasive sand blasting media 50 lb. bag. Excellent for cleaning, buffing, and preparing surfaces. It is a non toxic media which is soft and can be reused. Vaniman sandblasting media is sieved and sifted resulting in accurate and reliable blasting results. 50 lbs. 20 40 grit Mohs Hardness Rating: 2. 5 3. 5 Reusable Additional Information Weight53 lbs Dimensions22 16 10 in