The inspection porthole on this line of CS-1 gyratory sifters allows easy access to visually inspect 100% of the screen area without the need to disassemble the sifter. The view port is easy to use and requires no tools. You simply unscrew two wing nuts and remove the metal cover plate. The optional view port is available on select decks for the sifter and includes front and rear side portholes with cover plates, self-adhering gaskets for the cover plates, and nylon wing nuts. Retrofitting existing CS-1 sifter decks is possible during the repair process. The inspection porthole facilitates maintenance and sanitation as well as helps to extend the life of the gaskets and decks. Sifter Parts & Service Inc., Wesley Chapel, FL 800-367-3591 www.sifterparts.comSifter Parts & Service Inc.