Cleaning carbon from intake ports and valves on turbo engines N54,N55 used walnut shell yellow The walnut shell powder is made from walnut broken shell, It is widely used for the surface cleanness. Mositure: 5%max Impurity content: 0.03%max Mesh size: 8-12mesh, 12-20mesh, 20-30mesh, 30-40mesh, 40-60mesh, 60-80mesh, 80-120mesh Colour: yellow Packing: double plastic bag or according to your requirement
