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Rubber and Plastic Panels for Ventilation Ducts. High Fire Resistance: Achieves national B1 fire-proof standard with oxygen index >=32%. Moisture & Water Resistant: Extremely low water vapor transmissibility and vacuum water absorption <=3%. Flexible & Durable: Good flexibility with compression springback rate >=70% and aging resistance. Fast Delivery: Common specifications in stock; goods can be picked up within 7-15 days. Professional Service: 10+ years experience providing professional advice and safe packaging. Customization Available: Customization from samples is supported for specific requirements.