【Size】 20cm x 20cm x 1cm, 4 sheets 【Wavy Structure】 Wavy processing that increases sound absorption by expanding the sound absorption area. It absorbs sound by responding to sound incidence at random angles. It can be easily cut with scissors, so it can be installed in various places. The back side has full-surface adhesive tape, so just peel off the release paper and stick it on. Easy to install for DIY recording booths, soundproofing measures for rooms, etc. Recommended for soundproofing walls, entrances, and toilets! Absorbs noise and improves the quietness of the car interior. It is effective when applied to the outer panel behind the speakers and other door panels. Combined with damping sheets (deadening sheets), even higher soundproofing effects can be expected. 【Custom Order Available】 We also accept changes in the number of sheets and size, so please feel free to comment. We also offer set sales with deadening sheets (damping material). *Please note that there may be slight errors due to hand-cutting.