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50mm Acoustic Mineral/Rock Wool Tube/Pipe/Sleeve for Heating/Cooling/Oil/Exhaust/HVAC Pipeline Wrapping/Wraps Insulation. Class A Fireproof Performance: Inherently non-combustible with Class A fire rating for maximum safety. Customizable Length: Product length is fully customizable to meet specific project needs. Eco-Friendly Material: Asbestos-free and contains no CFCs, HCFCs, or HFCs. Superior Hydrophobicity: 99% hydrophobicity ensures low water absorption and durability. Comprehensive Certifications: ISO9001, ISO14001, EN13162, and OHSAS18001 certified.