GUERRI Sound Proof Foam Panels – 12 x 2″-36 Pack Wedge (No Adhesive), Black
【Easy to Install】36 Pcs Covers 36 Square Feet. Using stickers or a special adhesive spray (not included) for acoustic foam, the panels are very easy to install on any surface. Performs good in absorbing and eliminating unwanted echoes, flutter echoes, standing waves, reverb.