Breville’s own 54mm bottomless (naked) portafilter, for its 54mm home machines
— the Barista Express (and Impress), Barista Pro, Barista Touch (and Impress),
Bambino, Bambino Plus, Duo Temp Pro and Infuser. Removing the spout lets you
watch the extraction and spot channeling, which is why “bottomless portafilter
Barista Express” is such a common search. Breville’s page states only
“Compatible with 54mm Breville espresso machines,” so it is cross-referenced to
the nine 54mm Breville machines whose own official pages state a 54mm
portafilter; it does not fit Breville’s 58mm machines (Dual Boiler, Oracle,
Oracle Touch) or any standard 58mm machine. Verified against Breville’s
official page on 2026-07-13.
FAQ
What size is the Breville Naked Portafilter 54mm?
It is a 54mm portafilter, for 54mm portafilter machines.
Does the Breville Naked Portafilter 54mm fit 58mm machines?
No. It is 54mm (Breville's proprietary size), so it does not fit standard 58mm machines.
Which machines does the Breville Naked Portafilter 54mm fit?
https://www.breville.com/en-us/product/bea204wlw0zna1(archived) — Official Breville (US) product page, read firsthand 2026-07-13. Product name verbatim: 'the Naked Portafilter™ 54mm'. A naked (bottomless) portafilter to 'Visually diagnose and troubleshoot your extraction to achieve your perfect pour'; 'Made from stainless steel and walnut' with a 'Balanced handle made from walnut'; states 'Compatible with 54mm Breville espresso machines'.