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Rock Wool Acoustic Insulation Board, Fire Resistant, Fast Delivery, Factory Direct Low Price. Fireproof and Non-Asbestos: Class A combustion performance, 100% non-asbestos, safe for human bodies. Excellent Sound Absorption: Superior noise reduction and sound insulation capabilities for various applications. Waterproof and Durable: Resistant to water, corrosion, and pests with high compression strength. Energy Efficient: Low thermal conductivity coefficient ensures outstanding energy-saving effects. Fast Delivery: Standard delivery within 10-20 days after contract signing. Comprehensive Warranty: 2-year after-sales service coverage for all mechanical and material defects.