Apple Black Silicon Carbide Waterproof Sandpaper. Silicon Carbide Material: Made of high-quality silicon carbide abrasive for effective cutting and grinding. Waterproof Design: Water-resistant sandpaper suitable for wet sanding applications on various surfaces. Wide Grit Range: Available in grit range P60-P3000 to meet different coarse to fine finishing needs. OEM/ODM Service: Accepts logo customization and full OEM/ODM services for brand-specific requirements. Free Sample Offer: Provides free samples for customers to test quality before placing bulk orders. Fast Response Time: Engineers available for quick response within 24 hours to address customer inquiries. Quality Guarantee: ISO 9001 & 14001 certified processes ensure consistent product quality and reliability. Competitive Pricing: Direct from factory pricing ensures competitive costs without compromising quality.