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Class a Flame-Retardant Nonwoven Soft Rockwool Insulation Roll/Felt for Industrial Residential Fireproof. Class A1 Fire Rating: Non-combustible basalt material ensuring superior fire protection and safety. Versatile Applications: Ideal for building insulation, industrial equipment, and fire-rated ducts. Professional Support: Comprehensive online technical support and on-site construction guidance. Flexible Ordering: No specific MOQ required; accepts orders for various project sizes. Certified Quality: Holds CE and ISO certifications with standard compliance reports.