Pneumatic tube known as trachea, pneumatic hose, which has a lot of variety, commonly used PU raw materials to production, quality and stability, high pressure resistance, weather resistance, abrasion resistance, twists and turns, flexible tube smooth, bright colors, high elasticity, resistance to flexing, bending radius is small. Divided into polyester and polyether. Polyester pneumatic tube over gas type, such as excessive water will be used to affect the life, polyether pneumatic tubes can also be over-air over the water, more stable physical properties, flexibility will be more good, normal life will be longer It is an ideal pneumatic tube material. Gripper tube is in the middle of an ordinary pneumatic tube wrapped with fiber, so that the gripper tube is more durable than ordinary pressure pneumatic tubes, easy to burst pipes.