MATERIAL: Sanding sponges are made from high-quality brown corundum with high-density sponge as the base. Useful and portable. VARIOUS SPECIFICATIONS INCLUDED: Meets a variety of sanding needs. WET AND DRY USE: Sanding block is washable and reusable. Can be used both wet and dry. Easy to clean, durable, and comfortable to grip, with high tear resistance. WIDE USAGE: Suitable for wood, paint, metal, plastic, and drywall. Ideal for small jobs and effective on irregular, curved, or geometric surfaces. Portable and practical. A reliable tool for polishing and cleaning. Note: Measurements are manually taken. Please allow 1–3 cm variation. Color may vary slightly due to lighting and display differences. Actual product may differ slightly from the image.