250DX250D 36X36 380gsm Best Selling Manufacturer Mine Ventilation Duct Portable Blower Hose Flexible Vent Duct PVC Laminated Coated Fabric is a high-quality mine ventilation duct designed for extreme working environments. It uses PVC coated fabric to ensure durability and anti-aging performance, and is waterproof, oil-proof and chemical-resistant. The duct is flexible. It is suitable for mines, tunnels and other areas that require strong ventilation. The size of the duct is 250DX250D, 36X36 inches, and the high-density fabric of 380gsm enhances its ability to withstand high-pressure airflow. The product is light and easy to carry and install.