Specially extruded 6063 aluminium profile.

Variable diffuser consists of plenum box made of galvanized sheet steel and diffuser plate. Frame and adjustable blades consist of aluminum sections-anodized to natural aluminum color. Volume control

The eggcrate grilles and registers are constructed of thin interlocked aluminum strips assembled in a square grid fashion that is available in a variety of grid sizes. Eggcrate grilles and registers h