Acoustically effective lampshade made of high quality, self-supporting, recycled PET felt with sound absorbing properties; high quality visual and tactile surface, marble grey; colour may deviate; for attaching to SONIC suspended or SONIC free standing; subsequent attachment possible; General: Luminaire / Track, Mounted, marble grey Physical: diameter 527 mm, height 300 mm, 1 kg Acoustics: Alpha w ($\alpha_w$) up to 0.6, SAC (sound absorption class) up to C, NRC up to 0.6, SAA up to 0.58, Acoustic data calculations based on SONIC ACOUSTIC SOUNDCAP, cavity 174cm 059-773111D