Paquete de 60 paneles de espuma acústica 12x12x2 insonorizados pared techo estudio amortiguación de ruido

Let them expand 24 hours, optionally soak corners in water to reshape, then attach with spray glue or double-sided tape (not included). 60 acoustic foam panels are included. Can I use these panels for HVAC or machinery noise?.

eBay