Cline Aluminum manufactures a variety of custom aluminum doors based on standard construction designs. The basic types of doors manufactured are Flush Doors (Series 100BE), Stile and Rail Tube Doors (Series 500BE), Heavy Commercial Screen Doors (Series 360SE), and Fiber Reinforced Polyester Flush Doors (FRP). Along with the manufacturing of commercial doors, Cline produces a wide variety of custom framing systems.