Acoustic element made of high quality, self-supporting PET felt with sound absorbing properties, consisting of at least 50% post-consumer recycled PET; high quality visual and tactile surface, marble grey; colour may deviate; high acoustic performance by doubling the material; for attaching to SONIC suspended or SONIC free standing; General: Luminaire / Track, Mounted, marble grey Physical: diameter 1280 mm, height 50 mm, 8.8 kg Acoustics: Alpha w ($\alpha_w$) up to 0.7, SAC (sound absorption class) up to C, NRC up to 0.85, SAA up to 0.91, Acoustic data calculations based on SONIC ACOUSTIC ABSORBER ring 1280, cavity 180cm 059-771111D