The 6 PACK HERCULES 600 Grit 9x11 Wet/Dry Sanding Sheets are a set of 30 pcs. black sandpaper sheets made from aluminum oxide. Suitable for various materials such as wood, drywall, paint, metal, and plastics, these sanding sheets are designed for both wet and dry sanding applications. With a fine sanding grade and a 600 grit voltage, these sheets are durable and efficient for achieving smooth and polished results. The HERCULES brand ensures quality and reliability, making these sanding sheets a valuable addition to any workshop or tool collection.