They are designed to isolate the bottom rail of the RV blind from hitting the window frame. By doing this you can walk around in your RV and not have your RV blinds hitting the window and making so much noise. They are inexpensive and easy to install. (Optional Gray, White,Black or Brown ) Installation. At the bottom of your blind is a rail. On the window side of the rail you need to clean that surface and then stick the blind silencer to it. You will need to install the blind silencer at…