Vicoustic Multifuser Wood MKII 36 Black, Solid Wood Diffuser, Based on a QRD sequence in combination with variable reflection techniques (as a result of angled surfaces), Panel consists of two parts -- each part can be rotated in different directions to achieve a uniform, omni-directional sound dispersion, Optimal effective range of the Multifuser wood 36: 470 Hz to 10 kHz, Fire protection class: Euroclass E, Dimensions: 595 x 595 x 96 mm, Weight: Approx. 13 kg, Colour: Matte black, Includes 4x VicFix J Profile 80 mm mounting system