Hofa Absorber grey, Absorber Tiles, Suited to absorb mid and high frequencies, High efficiency: at 200 Hz about 50% of absorption, Complete absorption above 500 Hz, Effective acoustic elements for the optimization of room sound, For best possible room acoustics such as in recording studios, home theaters or home recording, Frame: Birch plywood, Acoustic Material: Basotect acoustic foam, Gray clothing, Low inflammability, Can be combined with HOFA Exchange Frame for flexible room acoustics, Dimensions: 500 x 500 x 110 mm, Weight: approx. 3.1 kg, Colour: Grey