Hexagonal acoustic element made of high quality, self-supporting PET felt with sound absorbing properties, consisting of 60% recycled PET; high quality visual and tactile surface, marble grey; foreign fiber inclusions possible; to combine with HEX-O 500 or HEX-O MODULE 500; installation without tools; General: Luminaire / Track, Mounted, marble grey Physical: length 750 mm, width 650 mm, height 237 mm, 3.3 kg Acoustics: Alpha w ($\alpha_w$) 0.95, SAC (sound absorption class) A, NRC 0.9, SAA 0.96 073-691640D