The same insert found in the PC II AVCS case. A generic interior that allows your case to adapt to a variety of equipment. It comes with a 1/2" sheet of HD foam for the bottom, a large outer cloth covered padded ring with Velcro on the outside to grab the case walls and 2 partial rows of Velcro inside that allow you to adjust the semi-rigid divider as needed, plus a sheet of convoluted foam for the lid.