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Intumescent Fire Grille//Air Grille/Fire Damper. OEM & Customization: Customize according to drawings or samples as per your requirements. Wide Application: Suitable for walls, doors, floors, ventilation systems, and partitions. Certified Quality: Products hold CE and ISO certifications for safety and reliability. Professional Manufacturer: Over 20 years of experience in fire, smoke, and acoustic seal products. Quality Control: Professional QC staff control production based on confirmed samples. Free Samples: Free samples are available for quality verification before ordering. Flexible Payment: Supports T/T, Western Union, PayPal, and other secure methods. Fast Delivery: Shipment arranged within 7-30 days after receiving the deposit.