Transportation Products, Inc. (TPI) is a leader in the manufacture of custom windows for use by builders of Transportation and Industrial vehicles.  Located in South Central Alabama, our modern plant is staffed and equipped for economical high volume production.  Each TPI employee is fully empowered as a "Quality Control Inspector" and we take pride in the fact that we produce custom windows to the highest possible standards.  Users of TPI products include manufacturers of busses, trucks, trolleys, boats, ambulances, semi-tractors, diesel locomotives, heavy equipment, and skid steer loaders.  The varied requirements of such a diverse customer base, demand the utmost flexibility in design, development, and manufacturing capabilities.  TPI meets these demands.  We can produce windows to your existing specifications, or our engineers will be happy to work with you to develop a product to fit your particular needs.  As new designs are developed, they are subject to various tests to assure they meet the design criteria of our customers and our own engineering department.  These tests include inspections for appearance, fit, function, and water leakage.  Then, special shipping containers are designed to protect against in-route damage so our windows arrive at their destination in perfect condition.  Although windows shown on this website are standard designs, they do not begin to fully cover the capabilities of TPI.  If you do not see the window you need, please call, fax, or email us for assistance or quotations.  We welcome the opportunity to serve your custom window needs.