Acoustic element made of high quality, self-supporting PET felt with sound absorbing properties, consisting of 50% recycled PET; round design; high quality visual and tactile surface, felt grey; colour may deviate; for mounting on the INO circle suspended cable suspensions, above the luminaire; subsequent attachment possible; General: Luminaire / Track, Mounted, felt grey Physical: diameter 648 mm, height 9 mm, 1 kg Acoustics: Alpha w ($\alpha_w$) 0.6, SAC (sound absorption class) C, NRC 0.55, SAA 0.57 034-370211G