sia Abrasives, Inc. USA is based in Charlotte, NC. We serve the entire U.S. market from our 75,000 sq. ft. conversion and distribution facility. Our 71 associates are dedicated to offering 24 hour turnaround on our broad range of stocked items and 3-5 day turnaround on custom belts. Strategically located near the Port of Charleston, SC, sia Abrasives, Inc. USA converts the finest quality coated abrasives in the world from jumbo rolls produced in our world-class facility in Frauenfeld, Switzerland.