Check the listing for details. Starcke Premium 9 Inch PSA Sanding Discs Aluminum Oxide. Condition: New. Listed at 27.80 USD. * 9 Inch ' 10 or 25 Pack ' Grit: 36/40/60/80/120 * Premium brown Aluminum Oxide grain on X-weight cloth backing * PSA/adhesive backed tabbed sanding disc with easy release liner for use with backup pad * Exceptional results in dry sanding and finishing applications for wood, metal, fiberglass and composites Specially engineered for your toughest applications * Professional grade, German quality, stocked & shipped from the US Starcke is family owned with over 100 years of experience in manufacturing abrasives "X" weight cloth sanding discs. High quality Aluminum Oxide material. Individually cut discs with Pressure Sensitive Adhesive (PSA) - each disc includes a protective release liner that provides for maximum adhesion and prevents grit, dust and air from degrading the disc's backing. Used for dry sanding on wood floors, natural stone, plastic, fiberglass and concrete. High quality German industrial abrasives factory direct.