The Auralex VersaTile combines a visually attractive absorptive panel with specially engineered air cavities to yield extraordinary sonic benefits. The VersaTile design allows it to be implemented in a variety of ways: it can be positioned to bridge a corner, creating a sizable air pocket that offers some great low frequency absorption, or can also be placed on walls and ceilings with either side out, allowing for some sophisticated looks along with superior absorption characteristics versus thinner, flat acoustic foam panels. This item is a 24-pack of 16 x 24" Purple panels.