Here you will find all Grada ceiling diffusers with adjustable core for supply and extract! These diffusers are extremely suitable for a 600x600 suspended ceiling. The air is adjustable through the adjustable core and thus the diffuser is suitable for horizontal or vertical discharge. The ceiling diffusers have a top entry spigot, available in different diameters. The ceiling diffusers with adjustable core are made of steel. Still looking for another diffuser? Then take a look at our full range of ventilation grilles!