Excellent solution for reducing unwanted reverberation and echo in a room Sound absorbing Ideal for home theatres, offices, boardrooms, restaurants, classrooms and recording studios 500mm x 500mm x 40mm Acoustic tile Convoluted panels are typically referred to as "egg-box" foam. High end absorption at affordable prices. Available in Black, Red & Grey Suitable for interior use only. Quick and easy to install (Glue gun, Tape measure & jigsaw required) Contact our agents for onsite installation services available Material: Acoustic Polyurethane Foam. After comparing online prices, www.marvel.co.za should be the cheapest on this product.