It's constituted by a monolithic core of incombustible calcium sulfate, class 0 (A1 about DIN4102), REI 90/RE 120 certificated. Its size is mm.600x600 available in the mm34 or mm.28 standard thickness (on request between 20 mm and 36 mm). It   s very high density (1500 kg/m3) permits to obtain the highest performances of acoustic comfort, in deformability and safety in case of fire.