The Blasting & Polishing Material That Cleans and Refines Eco-Shell provides a variety of walnut shell sizes that blast and polish everything from metals and woods to fine jewelry and gems. Our in-house raw material stock guarantees a consistent, high-quality supply without interruption. Features & Specifications Custom Grades: Eco-Shell custom-produces and tailors sizing for all blasting & polishing applications and needs. Fits Your Process: We will work with you to supply sample product for research and development. Key Benefits: Eco-Shells walnut shells are not chemically processed, have no heavy metals, and are asbestos-free. Readily Available: Annually renewable, your walnut shell applications are protected from supply chain bottlenecks. Durable & Reusable: Walnut shells can remove matter from surfaces without scratching or pitting underlying material. Naturally Refined: Walnut shell media can polish and clean fine metals, alloys, mechanical parts, shell cartridges, rocks, stones, coral, ivory, seeds, and more. Download the Applications & Industries Sizing Sheet *Sizes are based on U.S sieve standards. Millimeter and inch measurements are approximate.