base material chooses high-grade inferior smooth shading aluminum material, this material can do, acid and alkali resistant, anti-aging corrosion. Blade surface design, appear beautiful stripe is stereo feeling. That leaves little space, intensity is out of shape not easily. Soft rubber isolation between blade, do not contact directly, in use greatly reduces the noise, the fitting is high strength rubber, plastic with fixed plug-ins, increases the security and reliability of the door curtain, improving the service life.