The United States imports thick fabrics, high strength materials, hard and tough, and never leak, built-in special soft board, to facilitate the work, fast charge and discharge gas, can load 200 kg pressure, durable; Note: Do not over-inflated operation, such as long working hours, after a hold up, the balloon spread out, put another triangular pieces of wood, it can be used to open the car door, convenient and quick opening, provide wholesale.