Acmilan Black Silicon Carbide Waterproof Sandpaper. Silicon Carbide Material: High-performance abrasive made from silicon carbide for efficient grinding. Waterproof Design: Designed as waterproof sandpaper for wet and dry sanding applications. Wide Grit Range: Available in grit range from P60 to P3000 for various finishing needs. OEM and ODM Services: Factory offers full customization including samples, designs, and flexible options. 30+ Years Expertise: Over three decades of dedicated R&D and production in advanced abrasives. ISO Certified Quality: Manufacturing processes certified under ISO 9001 and ISO 14001 standards. Fast Response Support: Engineers available for quick response within 24 hours for technical issues. Free Samples Available: Free samples are offered to clients for product evaluation and testing.