These Bowl Screens for the Herbalizer vaporizer were designed to maximize the airflow and help with particulate filtering. They are Original Equipment Manufacturer (OEM) parts that help your device produce smoother and cooler vapor. This pack comes with 24-pieces bowl screens, so you will always have spares ready for use. Because these screens are stainless steel, you can trust they will be long-lasting, durable, and highest quality. To maximize your bowl screen usage once your top screen is already oily and filled with gunk, place it at the bottom of the bowl and run your vaporizer at the highest temperature for a blast of vapor.