B-Stock, the t.akustik Diffusor Manhattan eps set includes 2 pieces, diffusor acoustic elements made of hard EPS foam, for the optimization of room reflections in the mid and hi-mid frequencies, best used for recording studios, broadcast stations, homerecording and HiFi-rooms, sonical efficiency from 900 - 3250 Hz, can be easily painted using water-based paints (must not contain solvents!), simple to assemble, dimensions: 600 x 600 x 150 mm, box includes 2 pieces deliverd as assembly kit, assembly kit is made of 13 single parts, acoustic glue is recommended for assembly and installation, B-Stock with full warranty, may have slight traces of use