Feature:1. ULTRA FINE SANDING SPONGES: This set includes 10 pieces of ultra fine sanding sponges with a dual sided design, featuring 1000 grit on green side and 5000 grit on the white side.2. VERSATILE USES: Use these sanding blocks for polishing watch straps, nail filing, fine woodworking, cleaning and polishing metal, sanding clay, finishing wooden furniture, woodturning finishes, automotive work, and more.3. WASHABLE AND REUSABLE: Easily wash and reuse these sanding blocks by simply rinsing with water. They can be used multiple times, providing convenience and effectiveness.4. PORTABLE AND CONVENIENT: These sanding blocks are lightweight and compact, making them easy to carry and use on the go. Whether you're working on projects at home, in the workshop.5. ROBUST MATERIALS: Constructed with robust sandpaper and soft sponge material, these sanding blocks offer maximum resistance to clogging and loading, increasing productivity and reducing material consumption.Specification:Item Type: Sanding BlockMaterial: Foam/sponge, sandpaper, White Side: 5000 GritGreen Side: 1000 GritProduct Size: Approx. 9 x 4 x 1.3cm / 3.5 x 1.6 x 0.5in .Package List:10 x Sanding Block