These are custom noise killer kits made from our 8 lb. ArtWool and B10 NR MAX board that have a high blocking and absorption rating. We price these based on a reflected ceiling plan or sketch. The unique non-directional structure of ArtUSA ArtWool Insulation content is denser than traditional insulations. This effectively reduces airflow and essentially, sound transmissions. Higher air flow resistivity means better sound attenuation.