Alston Preformed Interior Panels are designed to be slightly oversized, and give you the opportunity to make the final trim to the exact dimensions of your car. Each Alston Preformed Interior Panel is hand crafted, not punched from a machine. Alston bead rolls every structural panel for extra strength and appearance. All Alston Preformed Interior Panels are constructed from lightweight aluminum alloy or heavy gauge steel. Alston Preformed Interior Panels are shipped with a tuff PVC protective coating to assure that the surface is not accidentally scarred or scratched during handling. This PVC coating is easily removed after installation. Alston Preformed Interior Panels attach with pop rivets or dzus fasteners.