Customize your case to meet your special requirements. This kit is designed to fit into the PC II size cases and consists of four layers of gray medium density foam 1.25" thick cut to fit the bottom of the case with a sheet of convoluted gray foam for the lid. A generic kit for most any application. Simply lay what you want to protect on the foam layers, use a marking pen for an outline, and then with an electric carving knife, craft knife or scissors, cut out the shapes. Just be sure to leave enough material in the remaining walls of the foam to be protective of all items as they bounce around. One inch is the recommended minimum wall thickness.