The Volcano Vaporizer Easy Valve Filling Chamber is made by the same manufacturer that produces every Volcano device. It is designed to work with aromatic ground blends or dried herbs. The device comes with a single screen that helps hold the aromatherapy material in place. It works great with the standard balloon bag from Volcano, and it produces clean, premium-tasting vapor. It holds up to 0.5 grams of your favorite blend, and it is fully compatible with all Volcano devices.