This bellows adapter kit is a perfect addition to your single dosing workflow. It's designed specifically to fit on and extend the functionality of the official Baratza Single Dose Hopper for Conical or Flat Burrs from Baratza and enables you to reach 0.0-0.2g retention for each dose. (Hopper itself is not included) Features Adds the bellows feature to the existing official Baratza Single Dose Hopper. (Hopper not included) Super low profile design fits under the cap with a very minimal addition to height Simple installation, taking less than a minute and requiring no additional tools Precise press-fit into the hopper. Once installed, it's wiggle-free and will not fall out. Can be pushed out from underneath with a stick-like object IMPORTANT Note About Compatibility The adapter kit is currently only compatible with the following: Baratza's Single Dose Hopper For Conical Burr Grinders [6116] (Short Version Starting From Early 2024) (Hopper not included) Baratza's Single Dose Hopper For Flat Burr Grinders [8116] (Short Version Starting From Early 2024) (Hopper not included) Baratza's Single Dose Hopper For Conical Grinders [6115] (Taller version before 2024) (Hopper not included) It is NOT Compatible With: Baratza's Single Dose Hopper For Sette [S916] Baratza Encore ESP Pro Options Adapter Only If you've previously purchased one of my Niche Zero/Duo bellows or the low profile single dose bellows used in most of my other Single Dose Hoppers, then you can get just the adapter and the bellows will work on it. Subpar Bellows These pieces will have a pronounced distorted form, and possibly other surface blemishes, but they otherwise are fully functional. Although some of the openings of the bellows may look far from circular, they will conform when placed into the funnel. Compared To My Other Products For Baratza Grinders Bellows Adapter Kit This kit is functionally very similar to my own Single Dose Hopper for the Baratza grinders, so you can enjoy the same low retention experience if you happened to have purchased the Baratza single dose hopper before finding out about mine. INTROVERT Single Dose Hopper My single dose hopper is a one-stop solution with a low profile hopper and optional bellows solution for the grinder. It will have an increased dosing capacity compared to the capacity of the official Single Dose Hopper after the kit is installed. The bellows it uses is the exact same. For Example: Single Dose Hopper for Encore INTROVERT Bellows for Stock Hopper The simplest solution for upgrading to your stock grinder is the bellows that's meant to fit between the stock hopper and lid, which pushes a powerful shot of air through the grinder every pump. For Example: Silicone Bellows for Encore The rest of the Bellows and Single Dose Hoppers for Baratza can be found here *Disclaimer The finest grind range (0-20) may decrease bellows effectiveness due to restricted air flow. Adjust to a coarser range (20+) while pumping bellows to fully clear retention. Grinding after changing grind size may still cause some retention Using darker roasts may cause more retention RDT method not recommended Achieve the best results with lighter roasted beans and at a consistent grind size setting Listing does not include the single dose hopper, the grinder, nor the stock hopper in the photos INTROVERT is not affiliated, associated, authorized, endorsed by, or in any way officially connected with Baratza, or any of its subsidiaries or its affiliates. The name Baratza as well as related names, marks, emblems and images are registered trademarks of their respective owners.