Acoustic element made of high quality, self-supporting PET felt with sound absorbing properties, consisting of at least 50% post-consumer 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 1050 mm, height 9 mm, 1 kg Acoustics: Alpha w ($\alpha_w$) up to 0.6, SAC (sound absorption class) up to C, NRC up to 0.55, SAA up to 0.57, Acoustic data calculations based on INO CIRCLE ACOUSTIC 700 circle, cavity 100cm 034-370411G