The Volcano Hybrid Filling Chamber Reducer by Storz & Bickel was made for the evaporation of small quantities of dry herb. You can also use this with dosing capsules, just set it inside. Chamber Features: Use: Dry Herb Replacement Pieces For the Volcano Hybrid What's in the Box: 1x - Filling Chamber with Reducer 1x - Cap Ring 3x - Stainless Steel Regular Mesh Screens 3x - Stainless Steel Small Mesh Screens 1x - Dosing Capsule 1x - Cleaning Brush