Suitable for logistics warehouse and workshop etc., with strong, durable, beautiful. The Shutter total thickness is 40mm,45mm,50mm,the two-sided0.5mm thick.Steel Corporation color spreads the steel plate, coating processing top-down for gathers the fat coating, the primer, the deactivated level, the galvanization level, the orange grain embosses, the reverse side linearity presses the muscle to strengthen the shutter intensity.  Composit with sound insulation, sound absorption, damping material and surface composition.And installing the hinge position to be equipped with the continual steel belt, guarantees the hinge reliable installment.