Each Reg Barber base is precision machined and hand-finished to well within 0.1mm. Refined over 30 years of collaboration with baristas around the world, customers often own more than one style for different machines or to attempt different extraction profiles.
C-Flat
A slightly curved perimeter pushes coffee grounds to the side of the portafilter basket, creating a more complete seal. This can help reduce channeling.
Ripple
Another Reg Barber innovation, concentric ridges increase puck surface area without creating significantly different puck depths for an even extraction.
C-Ripple
Pushes grinds to the side of the basket to minimize channeling while increasing puck surface area without creating different puck depths.
Curved - US
The slightly curved face pushes grinds to the side, reducing channeling while increasing puck surface area.
Curved - Euro
An deeper curvature promotes a more complete seal between your coffee grinds and portafilter basket while further increasing puck surface area.
Precision
A slightly tapered base with a hard edge to push fit to the limit while reducing the chance of suction.