ALL NEW TOP LID VENT CAP
This cap is needed to eliminate moisture laden air that can build up under the top lid. This moisture laden air can cause condensation in certain temperature swings. This cap serves the same purpose as the vents on the roof of your own home that expel excessive moisture in the winter and heat in the summer. This new vent cap is very important in maintaining a dry interior for your cat.
*All Generation 3 Kitty Tubes will now include a top lid vent cap.
NOTE: This cap can be installed on all older model Kitty Tubes, and will greatly improve its performance. To install a vent cap on non Generation 3 Kitty Tube a 1½ inch hole is needed on the top dead center of the lid to install. We recommend using a standard 1½ inch hole saw to make this hole.
While I've never had any of the problems described in the product description, I felt it best to be proactive and install a vent cap to prevent any such thing.
As a single, older woman, I have to say it was quite easy to install. My only recommendation for other petite females, such as myself, is to be sure and hold the drill firmly with both hands. Overall, it took me no more than ten minutes to gather the tools and do the installation.