Auralex T'Fusor 3D Sound Diffusor, 23 3/4" Square x 6" Tall, Auralex item TFUS.

T'Fusor Diffusors are made from a lightweight and sturdy thermoplastic. T'Fusors drop easily into ceiling grids and are wall mountable with Tubetak Pro, EZ-Stick Pro Tabs, or mechanical fasteners. T'Fusors impart a sense of controlled spaciousness and work best when mounted with a varying alignment of the “T” pattern. Improved broadband diffusion can be achieved by filling the cavity we designed into the back of the T'Fusor Diffusor with acoustic foam or 1" rigid fiberglass.