This is the replacement Grommet and Screen combination for the Randy’s Chill vaporizer. It adds protection against debris clogging up the device and getting in places you don’t want it to. Make sure this piece (the screen especially) is cleaned on a regular basis to provide cleaner, and smoother hits. If the screen isn’t cleaned it will be harder to pull and you won’t get as large of a hit. Using 99% alcohol or any Randy’s Cleaner on the screen will easily remove grime, and the Orange Label cleaner is safe for the Rubber Grommet.