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Hot Sale Fire Proof Mineral Rockwool Board with Aluminum Foil. Customizable Length: Product width is fixed (600mm/1200mm), but length is fully customizable to client requirements. Aluminum Foil Options: Available with or without aluminum foil finish to suit different insulation needs. Quality Assurance: 100% inspection for finished products with strict quality control and reliable factory partnerships. Fast Lead Time: Average lead time is 15-20 days after receiving PO, with off-season delivery within 15 workdays. Free Sample Availability: Free samples are available for quality verification, though buyers bear delivery costs.