Hippo Black Silicon Carbide Waterproof Sandpaper. Silicon Carbide Material: Made with high-quality Silicon Carbide abrasive for superior cutting performance. Waterproof Design: Water-resistant construction suitable for wet sanding applications. Wide Grit Range: Available in grits from P60 to P3000 to meet various finishing needs. OEM and ODM Services: Factory offers full customization options including samples and designs. ISO Certified Quality: Manufactured under ISO 9001 and 14001 certified processes for reliability. Fast Response Support: Engineers available for quick response within 24 hours for technical issues. Free Sample Offer: Free samples are available for customers to evaluate product quality. Competitive Factory Price: Direct factory sales ensure high quality at competitive market prices.