*KeyFeatures *High-Efficiency Sound Absorption: The fiberglass soundproof panels is made with 100% white fiberglass liner, 2-inch/5 cm thickness, with an NRC value of up to 0.95, effectively absorbing mid-to-high frequency noise, reducing echoes and reverberation, and creating a quiet and comfortable environment for you *Self-Adhesive Design: The back features a self-adhesive design with 3M strong adhesive, ensuring it won't peel off easily. Installation requires no tools, making it quick and easy, significantly saving installation time *Reliable to Use: Made with 100% white fiberglass liner, no bad smell, and meet green E0 standards, ensuring safety for both breathing and skin contact, giving you peace of mind while using it *Wide Application: Suitable for various places such as homes, offices, meeting rooms, recording studios, cinemas, schools, etc., meeting your different soundproofing needs *Flexible Use: Each box contains 4 pcs of pure color fiberglass soundproof panels, with a single piece size of 23.62 x 11.81 inches / 60 x 30 cm,2-inch / 5 cm adhesive width, making it easy to use ******************************************************************************************************* *Specifications Item Model Number: KDLRB50-158-31 Set Quantity: 4 pcs NRC: 0.95 Color: Black Back Adhesive: 3M, Self-adhesive Main Material: 100% White Fiberglass Liner Net Weight: 4.36 kg / 9.61 lbs Item Dimensions (Single Piece): 600 x 300 x 50 mm / 23.62 x 11.81 x 1.97 inches ******************************************************************************************************* *Pakcage Content Soundproof Wall Panels x 4