TL;DR
- Slow Feeder Metal: the flagship. Machined aluminium housing, glass bean container, three colours.
- Slow Feeder Ultra: the same glass container and internals in a lighter 3D-printed body, at a more accessible price.
- Slow Feeder Pro V2: the same internals with a 3D-printed bean container and a lid included. The lowest price way to start slow feeding.
- All three feed the beans the same way, fit more than 40 grinders and charge over USB-C.
What all three have in common
The parts that touch your beans and control the feed are shared across the range:
- An aluminium feeder disc that lets the beans through at a steady rate.
- An anti-stall routine that detects a jam and clears it automatically.
- A variable feed rate, so you can set how fast the beans go in.
- Up to 50 g of beans, 25 g in roughly 60 to 120 seconds depending on the beans.
- A built-in 2000 mAh battery that charges over USB-C.
- A grinder adapter for your grinder, included when you order.
So the coffee side is the same. What you choose between is the body, the bean container and the price.
Side by side
| Pro V2 | Ultra | Metal | |
|---|---|---|---|
| Housing | 3D-printed | 3D-printed | Machined aluminium |
| Bean container | 3D-printed | Borosilicate glass | Borosilicate glass |
| Lid and single dose bellow | Lid included | Optional | Optional |
| Colours | Black | Black | Black, silver, white |
| Most popular with | DF64/DF83, Timemore Sculptor 078, Weber EG-1, DF54/DF64V, Fellow Ode | DF64/DF83, Timemore Sculptor 078, DF54/DF64V, Zerno Z1/Z2, Weber EG-1 | Weber EG-1, Zerno Z1/Z2, Timemore Sculptor 078, DF64/DF83, Kafatek Monolith |
Slow Feeder Metal: the flagship
Choose the Metal if you want the full precision-machined aluminium body that matches a high-end grinder. It comes in black, silver and white, and for the Weber Workshops EG-1 and the Lagom 01 there is a machined metal adapter as well. It is the model Simon Gautherin used on his way to second place at the 2026 World Brewers Cup.
Slow Feeder Ultra: the same feed, lighter body
We built the Ultra after hearing the same request again and again: the features of the Metal, without a price close to that of the grinder. The Ultra keeps the glass bean container, so you can watch the beans feed in, and puts the internals in a 3D-printed housing. Every part that touches your beans or controls the feed is the same as on the Metal.
Slow Feeder Pro V2: the way in
Slow feeding sounds great, but it is hard to justify a big spend before you have tasted the difference yourself. The Pro V2 is built for exactly that. It takes the Ultra's internals and swaps the glass container for a 3D-printed one, with a lid included. Same anti-stall system, same feeder disc, same variable feed rate, lower price.
How to choose
- You want to try slow feeding first: Pro V2.
- You want to see the beans and add a bellow later: Ultra.
- You want the best materials, a colour match or a metal adapter: Metal.
Whichever you pick, choose your grinder when ordering and we include the matching adapter.
Frequently asked questions
Does the Metal grind better than the Ultra or the Pro V2?
No. The feeder disc, anti-stall system and feed rate control are shared, so the feed is the same. The difference is materials, looks and price.
Can I add a single dose bellow?
On the Metal and the Ultra, yes: the bellow and lid are an option. The Pro V2 comes with a lid.
Which grinders do they fit?
All three fit more than 40 grinders. Choose yours on the product page and the right adapter is included.
