12Pcs Panels High Density Treatment Foam Cross-Line Sound Absorbing Board Soundproof Foam Sound Insulation Board for Treatment Wall Decoration 30*30*5CM Grey Features: Made of selected fibre material, flame retardant & breathable & environment-friendly & safe, harmless to human body. Due to high density material, it can provide great sound absorption performance and accommodate the mid to high frequency ranges, reducing noise and helping produce professional and high-quality recordings. The size of each panel is 30*30*5cm, which can be easily cut and DIY to meet your personal requirements. Just install them wherever you like. Come with 12 pieces and there are four optional colors for meeting different requirements. You can collocate free due to the aesthetic appearance. A great solution for reducing and absorbing unnecessary noise, echo, wave and reverberation in a office, bedroom, recording studio, broadcast booth, gaming room or podcast room, etc. Specifications: Quantity: 12Pcs Material: Fibre Color: Red / Black / Blue / Grey (Optional) Item Size: Approx. 30*30*5cm / 11.81*11.81*1.97in Package Size: Approx. 33*33*9cm / 12.99*12.99*3.54in Package Weight: Approx. 660g / 23.28oz Packing List: 12 * Panel Note: The product is shipped after compression, and it takes some time to recover rebound before use.