ATS Acoustics drop grid acoustical ceiling tiles fit into standard drop ceilings. Panels are 24" x 24" x 2" in size, weigh 3 pounds, and are certified for indoor air quality. The highly effective core is made of Knauf Board with ECOSE Technology for superior sound absorption, echo reduction, and clean audio. The panels are wrapped in ATS Acoustics exclusive line of Sona acoustical fabric from Guilford of Maine in a variety of colors to suit any style or décor. The panels feature a Noise Reduction Coefficient (NRC) of 1.05 out of 1, making them the standard in professional studio quality acoustical ceiling panels. These fit to standard drop-grid ceiling T-Bar designs, but the panels are easy to cut onsite with a straightedge and utility knife to fit any custom size. Installation is quick and easy, simply replace your existing drop grid ceiling panels with the acoustical panel, no tools or hardware necessary.