This assembly inchties inch down the screen in a fixed or horizontal position.Easy to install, this constant tension tie down assembly promotes screen life by preventing the screen from sagging and prematurely wearing in both dry and wet applications.All materials are food grade. All-thread and nuts are stainless. The cap and spacers are UHMW engineered neoprene.As the materials enter the separator the cap allow the particles (wet or dry) to cascade onto the screen, producing a more uniform and productive separation.