In a grand piano, Music Sorb can be easily installed by placing two units of the product directly on the sound plate of the piano. The product is contained in an elegant velvet designer bag that is not only aesthetically pleasing but is also non-abrasive and gentle on piano surfaces. To install Music Sorb in a vertical piano, remove the knee board and simply place the pre-packaged cassettes of the product in the bottom of the instrument. Some larger pianos or pianos in extreme environments may need more product.