20pcs / Pack 30x30x2.5cm Triangular Groove Style Recording Studio Drum Video Room Sound Insulation Board Silencer Cotton(Blue)

1. Material: polyurethane sponge
2. Easy to use
3. Effectively isolate the sound and use it safely
4. Can be used in professional studios, rehearsal rooms, concert halls, home theaters, recording studios, audio-visual rooms, etc.
5. Single piece size: 30x30x2.5cm