Effective treatment of sound insulation block corner filling is not in place Great for spot treating sound on walls in your studio or office - For use in recording studios, control rooms, Offices home studios, home Acoustic Foam is self-extinguishing and offers excellent sound absorbing qualities over a wide range of frequencies;It is easy to handle cut and install; The product is available with a wide range of functional or decorative facings Can be used in residence, redcording studios and home theatresschools, hosipital , environmental protection, automotive, Marine, architectural decoration, household appliance;etc. Vacuum bag packing.Effectively reduce costs.It only takes 6-12 hours to restore the original size after opening the package. Each Order Contains: 16 pcs Bass Trap