Acoustic element made of high quality, self-supporting PET felt with sound absorbing properties, consisting of 50% recycled PET; high quality visual and tactile surface, limestone; colour may deviate; high acoustic performance by doubling the material; for attaching to SONIC suspended or SONIC free standing; General: Luminaire / Track, Mounted, limestone Physical: diameter 1280 mm, height 50 mm, 12.1 kg Acoustics: Alpha w ($\alpha_w$) 0.7, SAC (sound absorption class) C, NRC 0.85, SAA 0.91 059-771111S