This is the replacement Screen pack 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 the screens are cleaned or replaced regularly. The screen is there to provide cleaner, smoother hits. If the screen isn’t cleaned or replaced often it will be hard to pull and you won’t get as large of a hit. These screens are easily cleaned with 99% alcohol or any of Randy’s Cleaners.