Ideally built for maximum security and ventillation the Duodex security grille shutters are designed for security and ventilation giving a "Corporate look" suitable for banks .These security grille shutters come in motorized version or manual version. The curtain are constructed from interlocking aluminium flat bars and round bars. In between these aluminium bars are metal rods which give the shutters strength in total security. The bottom base of this shutters are built with aluminium material. Motorized version and manual version are available.