The sytem with aluminium frame gives your space an elegant touch. The subframe is not needed, assembly is direct to the wall through screws. With an extendible matt aluminium frame for wall thicknesses from 90mm to 230mm. It includes gum seal in the perimeter and all the necessary ironmongery for assembly as well as the hinges (4no per frame). Complete it with a magnetic latch for a perfect and silent closing, providing design and elegance too.