Auralex Acoustics 4"" CornerFill Set Charcoal, 4"" Cornerfill, Flat cut studio foam-corner-absorber, Reduces the accumulation of low frequency sound energy in room corners, Dimensions: 100 x 100 x 610 mm, Colour: Anthracite, Set with 9 pieces, For handling and attaching, acoustic adhesive Art. #177265# is recommended