4 lbs or 1.8 kg Ground Walnut Shell Media 18-40 Grit - Fine Walnut Shells for Tumbling, Vibratory Or Blasting
- Fine Walnut Shells Polish Surfaces without Damaging the Substrate.
- 100% Crushed Walnut Shells, Environmentally Friendly..
- Use Low Pressure 20-60 PSI for Soft/Sensitive Materials. Exceeding 80 PSI Lowers the Longevity of the Walnut Shell Media..