Qingdao Tongshuai Door Manufacture Co., Ltd is the first professional door manufacturing enterprise in Shandong province with largest scale in the same industry of China.Our products include the garage door, industrial lifting door, high speed door and expanding door.

　　1. Material: best stainless steel, which can effectively prevent the extension door from rust and corrosion.

　　2. Surface: fine smooth surface, beautiful appearance, waterproof, dust-resistance,

　　3. Extension structure: with double-plane link lever,

　　4. Wheel: stainless steel link lever slide guide, steady moving,

　　abrasion proof, dust-resistance, and long using time .

　　5. Long distance between two guide rails, low barycenter, fine stabilization,strong outside & wind force resistance.

　　6. No noise, flexibility.

　　7. Optional: LED display screen.

　　The device for defending to climb and bump