Dyonery 3D fluted wood slat acoustic panels come in a set of 4 with size 47.24"×22.63"×0.8", covering 31.2 sq.ft. Featuring NRC 0.95 noise reduction, premium MDF and eco-friendly polyester fiber, formaldehyde-free and low-VOC. With modern 3D fluted design and Dark Walnut finish, they are easy to install with adhesive or screws, can be cut to fit various spaces. Ideal for home theaters, studios, living rooms, bedrooms, offices and commercial areas.