This system is the perfect solution for the most demanding customers, given the sheer number of customisation options. The key advantages include an enhanced thermal insulation performance that comes from the thermal insulation layer within the roller shutter box and the optional frame thermal insulation with narrow guide rails made of extruded aluminium for the Mini and Maxi shutter sections. This system can be installed with an optional roller insect screen on request. Another benefit of this model is the optional extruded aluminium sheet box, which can be installed without any encasing trim and matched to the window colour frame.