Made in Japan Soundproofing Sheet Roll 【For sound leak prevention in gaps】 Soundproof Fast Lab® Soundproofing Sheet, Soundproofing Material, Surface Density Approximately 2.1kg/㎡ (Width 5cm x Thickness 1.2mm) The length is approximately 7m. It has been cut from 10m by about 3m. *Please note that the length is approximate, so there may be some error. It is slightly damaged due to cutting, but there are no scratches other than the cut edges. Thank you.