The acoustic sound diffuser panels are 1.5-inch thick blue panels made of plywood and acrylic paint. They are suitable for installation on windows, floors, interior walls, ceilings, and rooms. The diffusers have an R11 insulation value and come with a lifetime manufacturer warranty. Made in India, the panels weigh 7 kg each and are packaged as a single panel. Designed to reduce sound reflections and improve sound quality, these panels are an essential addition to any acoustically treating space for professional and musical instrument practice.