Build it yourself and save. Safe, simple, and affordable. An easy to build and use exposure unit for making high quality stencils for screen printing. Ideal for exposing screen sizes of 24″ X 20″ or less. For only $9.99, purchase and download our “Build Your Own Exposure Unit Plans” pdf Ebook. Our “How-To” Ebook has numerous photos and includes where to obtain all of the parts. Videos show the easy assembly and operation of the unit.