Foam White Acoustic Thermal Insulation Board, For Sound Diffusers, Thickness: 5mm at Rs 120/sq ft in Bazpur
Amazon.com: 16 Pcs Professional Soundproof Board,Acoustic Board,Acoustic Treatment,Felt Sound Insulation Board,with Adhesive on Back,12x12" Suitable for Professional Studio Acoustic Treatmen (ash black) : Musical Instruments