I've been looking for a Silicone Bellows for my Niche Zero for a while. None of them "hit the sweet spot"... until now. The one made by INTROVERT is the best on the market: the fit is great, the price is right, and the service is excellent!
Thank you!

The best of product.

Fit and finish very good.
Works very well!
Definitely recommend this bellow who uses Niche Zero or Duo.

I have a Vario W+(purchased 2024), grinding medium roast for pour over. The hopper feeds all beans and no beans popcorn out of the hopper(20g dose). When using the stock hopper for single dose, a few beans would always hang up on the bottom lip of the hopper. I would then have to brush them down, while grinding.

The bellows is a perfect fit and clears the grinder with two or three puffs. I was retaining .5 to 1.0 grams before using the bellows. I think the item description of 0 to 0.2 grams of retention using the bellows is accurate.

Referencing the photos on the website item page. My hopper is different, having the printing seam lining up with the index mark/narrow lug. Index mark aligns with where the shutoff knob/lever is on the stock hopper. The photo with the hopper filled with beans on a scale is weird. On a Vario, just plan on leaving the hopper installed.

Looks and works great! Quick delivery too. Highly recommend.

The latest, silicone release of the INTROVERT bellows for the Breville Sage grinder is a big improvement on the previous 3D-printed version. The old-design bellows was already a great addition to the grinder, easily attaching to the hopper and significantly reducing retained grounds and the annoying last few dribbles after you grind. But the material from the 3D printed version was a bit stiff and it looked and felt less than professional. The silicone version blends seamlessly with the design of the grinder so that you'd never know it didn't come stock. I also no longer worry about wearing the material out with excessive use. The silicone has very smooth action and takes a very light touch, so there's no more splattering grounds all over the place. Its a really clever addition to the grinder and I'm very happy I upgraded to it.

Great product and does what it says!

The silicone is well-finished and fits perfectly on my Baratza Encore hopper. It feels like an original part. Now I just need to figure out how to reduce the static retention in the hopper...!

Works exactly as described, and has helped me flush out every last ground bit of coffee beans for my morning brew. It’s definitely a more efficient way of getting those morsels than slamming on the top of the lid with a fist. Thanks!

This is a fabulous add-on for your Breville/Sage grinder. It fits the device perfectly and does exactly what its meant to do - blow out the final grinds.

Never thought I would need something like this. Fast shipping, and cleans out the residue!

This thing just works! Phenomenal :)

A good dosing ring, well-made. Works with my Weber Workshops’ portafilter and its Unibasket.

My Niche Zero is zero retention using the bellows.

It works, maybe more air would be great!!