Pro-Gard Industries Solid Lexan Vented . However did you know that Lexan can be made into a vented version as well? Pro-Gard industries offers a better more cost effective and lighter weight vented version of the window which greatly increases heat transfer efficiency and water run off. The installation of this window is quick and easy because it requires no drilling bolts screws or removal of the window sash. It can be mounted from the bottom or the side with the screws or bolts provided. Package Contents: Pro-Gard Industries Solid Lexan Vented The Pro-Gard Industries Solid Lexan Vented is a quality addition to the Pro-Gard Industries lineup. For more great deals on Car Racks & Storage by Pro-Gard Industries please browse our Pro-Gard Industries Camping Gear page.