Hofa Absorber Eco grey, Absorber Tiles, Acoustic element absorbs mid and high frequencies, High efficiency: at 200 Hz about 50% 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, Acoustic material: Basotect Acoustic foam, gray fabric, Low inflammability, Can be combined with HOFA Exchange Frame for flexible room acoustics, Dimensions: 500 x 500 x 100 mm, Weight: approx. 0.42 kg