Acoustically effective lampshade made of high quality, self-supporting, recycled PET felt with sound absorbing properties; high quality visual and tactile surface, acoustic special colours; colour may deviate; for attaching to SONIC suspended or SONIC free standing; subsequent attachment possible; General: Luminaire / Track, Mounted, acoustic special colours Physical: diameter 527 mm, height 300 mm, 1 kg Acoustics: Alpha w ($\alpha_w$) 0.6, SAC (sound absorption class) C, NRC 0.6, SAA 0.58 059-773111X