Presenting Our 2.7L High-Durability Emergency Air Cylinder: Ideal for Harsh Conditions. This Type 3 Carbon Fiber Composite Cylinder is precision-crafted with an aluminum core wrapped in carbon fiber, striking an optimal balance between resilience and lightweight portability. Additionally, a reinforced glass fiber layer enhances its resistance, making it particularly suited to challenging environments like mining operations where reliability is critical. Designed to endure severe conditions, this cylinder is a vital resource, offering consistent and dependable respiratory support. With a 15-year service life, it stands as a durable solution for extended safety and efficiency, giving you and your team confidence and stability in demanding situations.