This entry covers the 18g size specifically — VST sells 7g through 25g baskets
and each capacity has a different depth (the 18g is 24.0mm per VST’s own size
table), so a single entry cannot honestly describe the whole range. The 18g was
chosen because per VST it fits most La Marzocco and Rancilio standard
portafilters without the bottomless-portafilter caveat VST applies to sizes
above 18g. Verified against the official VST store page on 2026-07-04. Not
compatible with 54mm machines such as the Breville Barista Express — VST states
its filters “DO NOT fit 49, 53 or 54mm portafilters”.
FAQ
What size portafilter is the VST Precision 58mm Filter Basket (18g) for?
It is a 58mm basket, 24mm deep, for 58mm portafilters.
Is the VST Precision 58mm Filter Basket (18g) pressurized?
No — it is a non-pressurized (single-wall) basket, for freshly ground coffee.
Does the VST Precision 58mm Filter Basket (18g) fit 54mm machines like the Breville Barista Express?
No. It is a 58mm basket, so it does not fit Breville's 54mm machines or any 54mm portafilter.
Which machines does the VST Precision 58mm Filter Basket (18g) fit?
La Marzocco GS3; La Marzocco Linea Micra; La Marzocco Linea Mini; Rancilio Silvia; Rancilio Silvia Pro; Rancilio Silvia Pro X — each confirmed against manufacturer sources (listed below).
Sources
https://store.vstapps.com/products/vst-precision-filter-baskets(archived) — Official VST store product page, read firsthand 2026-07-04. States verbatim: 'Designed to fit most 58mm Portafilters (inside diameter)'; '20g, 18g & 15g fits most La Marzocco, Synesso, Nuova Simonelli, Faema, La Cimbali, Rancilio'; 'Some Faema, La Cimbali, Rancilio may require a bottomless portafilter to use VST filters larger than 18g'; and 'VST Filters DO NOT fit 49, 53 or 54mm portafilters'. The page's per-size table lists the 18g basket at 24.0mm height (15g: 22.0mm, 20g: 26.0mm, 22g: 28.0mm, 25g: 30.0mm), which is where this entry's depth comes from. Available in standard (ridged) and ridgeless versions.