16 Pcs Pro Grade Soundproof Wall Panels,Acoustic Panels,Premium Sound Panels,Better than Foam,Wedge Design,with Adhesive on Back,For Acoustical Treatments/Professional Studio,12×12×0.4 in(Light grey) : Amazon.co.uk: Musical Instruments & DJ
12 Pack Set Hexagon Acoustic Panels, 12'' X 14'' X 0.4'' Light grey Color Bevled Edge Tiles Soundproofing Panels, Great for Wall Decoration and Acoustic Treatment : Amazon.co.uk: Musical Instruments & DJ