Replacing your Ventadome lid on your older model RV, just got easier. With two year ranges to choose from, you can get a cover, and keep the rain and bugs, out of your living space. Impact-resistant Comes preassembled Includes all mounting hardware Quick and easy installation Hardware is rust resistant Replaces models below:40158: For Ventline (prior to 2008) and Elixir (1994 and up) 40159: Old Elixir (pre-1994)