Breville’s own 58mm bottomless (naked) portafilter, for its 58mm machines —
the Dual Boiler, Oracle and Oracle Touch. Removing the spout lets you watch
the extraction and spot channeling. Breville makes this only in 58mm; the 54mm
Barista/Bambino machines are a different size and this does not fit them.
Verified against Breville’s official page on 2026-07-07.
FAQ
What size is the Breville Naked Portafilter 58mm?
It is a 58mm portafilter, for 58mm portafilter machines.
Does the Breville Naked Portafilter 58mm fit 54mm Breville machines?
No. It is 58mm, so it fits 58mm-standard machines, not Breville's 54mm Barista/Bambino line.
Which machines does the Breville Naked Portafilter 58mm fit?
Breville Dual Boiler; Breville Oracle; Breville Oracle Touch — each confirmed against manufacturer sources (listed below).
Sources
https://www.breville.com/en-us/product/bea304wlw0zna1(archived) — Official Breville (US) product page, read firsthand 2026-07-07. Product name verbatim: 'the Naked Portafilter™ 58mm'. A naked (bottomless) portafilter to 'Visually diagnose and troubleshoot your extraction'; states 'Compatible with 58mm Breville espresso machines'.