The Supergradhermetic adjustable roller blind allows perfect light regulation, of air inlet and privacy protection, thanks to the orientation of the slats. Allows airtight closure. Through the perfect fit of its slats, when the blind is down, total darkening is achieved inside. In the same way, the blind can be raised, leaving the window free. It is made of aluminum alloy, embellished and protected with high quality paints, applied and thermoset in a continuous process.