This package includes 6 screens for the Easy Valve Set. These are original and made by Storz & Bickel. The Normal Screen Set is best for those aromatherapy blends that are not fine enough to fall through the screens. Most popular aromatherapy blends are better vaporized with normal screens. The Easy Valve Fine Screen Set is best for those aromatherapy blends that are very fine and might fall through a Normal Screen Set. Works with the Volcano Classic and Volcano Digit! Notice to buyers: The product is considered goods in a sealed package that, once opened by the consumer, cannot be returned for hygienic reasons. Therefore, withdrawal from the purchase contract is not permitted. In compliance with applicable regulations, when selling smoking aids and electronic cigarettes online, the seller is required to verify that the purchaser is at least 18 years of age.