The United Abrasives/SAIT Ovation® Ceramic Flap Disc is contaminant Free. The Ovation® Ceramic Flap Disc is made with premium ceramic grain and provides cooler cutting and fast, consistent finishes. Fiberglass backing will wear uniformly with abrasive cloth, will not splinter or smear on the workpiece. Lighter, quieter operation. Proudly manufactured in the USA.RECOMMENDED USE: For use on ferrous and/or non-ferrous metals, stainless steel, high tensile steel, titaniumFEATURES: High density, Type 27 flat shape flap disc. Premium ceramic grain outlasts conventional zirconium in most applications. Cooler cutting and fast, consistent finishes. Fiberglass backing will wear uniformly with abrasive cloth, will not splinter or smear on the workpiece. Lighter, quieter operation. Proudly Made in the USA.COMPATIBILITY: Angle Grinder; 13300 max RPMSPECIFICATIONS: 4-1/2" diameter, 7/8" arbor, 40 grit, Type 27MATERIALS: Premium ceramic grain; fiberglass backing