This silicone bellows upgrade can help you achieve 0.0g to 0.2g retention on every grind* when you single dose on your Breville / Sage Barista Smart Grinder Pro and other models. It fits in between your machine's stock hopper and stock lid and transforms it into a blower, so you can say goodbye to the usual varying retention of 0.2 - 0.5 grams of coffee.

This bellows was the very first to market back in 2021, and has evolved after 3 years of iterations into a silicone version that is superior in flexibility, durability, and air tightness, allowing for a more effective clearing of retention per pump compared to my previous 3D printed version (discontinued August 2024).

[Design Features]

Simplicity and maximum effectiveness are our design goals, and both are carefully infused in our bellows' design.

The bellows complements the grinder's original design rather than replacing it and upsetting its visual balance
Super easy installation takes less than a minute
No tools necessary for installation
No warranty-voiding modifications needed
Small manual included with assembly instructions and best use tips
For the technical users, it displaces approximately 185mL of air per pump
Bellows works even if you prefer to store beans in the hopper (though less effectively)
Odour-free
Special surface treatment for reduced attraction to dust
Logo is hidden on the inner surface rather than around the outside

[Compatibility]

This bellows is compatible with:

Breville Smart Grinder Pro (BCG820)
Breville Smart Grinder (BCG800)
Sage Smart Grinder Pro (BCG820)
Sage Smart Grinder (BCG800)

And is also compatible with:

Breville Barista Express (BES870)
Breville Barista Touch (BES880)
Breville Barista Pro (BES878)
Breville Dose Control Pro (BCG600)
Breville Dose Control (BCG400)
Sage Barista Express (BES870)
Sage Barista Touch (SES880)
Sage Barista Pro (BES878)
Sage Dose Control Pro (BCG600)
Sage Dose Control (BCG400)

However, it is not compatible with:

Breville Barista Touch Impress (BES881)
Breville Oracle (BES980)
Breville Oracle Touch (BES990)
Sage Barista Touch Impress (BES881)
Sage Oracle (BES980)
Sage Oracle Touch (BES990)

[Additional Notes]

The bellows will add an additional 2.7cm (1-1/16in) to the height of your hopper after installation, but you need additional space above it. Measuring from the top of your lid without the bellows, you need about 9-13cm (3-1/2 ~ 5-1/8in) of clearance space to operate it comfortably.

[Optional Grinder Seal]

Add a seal to help you prevent buildup of beans and grounds in the groove around the outer burr. If you've used your Breville / Sage grinder for a while, you'll notice that some coffee beans eventually get lost there, and can be especially frustrating for single dosing. Installing this flexible silicone seal will prevent any major buildup and greatly decrease your overall long-term retention of beans. Include this seal in this bellows order for a combo discount.

Learn more here: https://introvertmakes.com/products/hopper-gasket-seal-for-breville-sage-grinders-and-machines

[*Disclaimer]

Grinding after changing grind size or using darker roasts/oilier beans may still cause some retention.
Achieve the best results with lighter roasted beans and at a consistent grind size setting.
The coarser you grind, the more likely you'll achieve zero retention
The more beans you store in the hopper, the less effective the bellows may be due to restricted airflow
Does not include the grinder nor the stock hopper

INTROVERT is not affiliated, associated, authorized, endorsed by, or in any way officially connected with Breville or Sage, or any of its subsidiaries or its affiliates. The name Breville or Sage as well as related names, marks, emblems and images are registered trademarks of their respective owners.

Smart Grinder / Pro

Silicone Bellows Upgrade for Breville / Sage Smart Grinder Pro - Near Zero Retention

Hopper Gasket Seal for Breville / Sage Grinders and Machines