K&M 11905, Sound Insulation Element for Orchestra Chairs with Back-Rest, With clamp for attaching to back-rests with single rod, The curved Plexiglas screen protects the orchestra musician from the sound of the rear man, Height, inclination and distance can be adjusted individually and steplessly, The shade can be easily and quickly attached or removed from the lower part due to the practical prismatic guide, Expandable with K&M Acoustic Absorber 11901, Height: 700 mm, Weight: 1.75 kg, Colour: Black