K&M 11905-BLACK Sound Insulation Element For Orchestra Seats With BackrestThe sound insulation element equipped with a clamp to attach to the individual backrest bar. The curved acrylic glass shield protects the orchestra musician from the sound emanating from the musician sitting behind them. Variable height, angle and distance adjustment according to ones individual needs. The shield can be attached to or removed from the lower section easily through the V shaped connector. It can be expanded through K&M Acoustic Absorber