IMS’s single-dose B70 basket — 1 cup, ~9-11g capacity, 26.5mm height with a
narrowed shaft so the small dose still forms a full-height puck. Same B70
border (Ø 70mm) and 58/58.4mm tamper standard as the 2-cup entry, so the
machine cross-references follow the same official IMS B70 list. Verified
against the official IMS product page and catalogue on 2026-07-05.
FAQ
What size portafilter is the IMS B70 Competition 1 Cup (B701TH26.5E) for?
It is a 58mm basket, 26.5mm deep, for 58mm portafilters.
Is the IMS B70 Competition 1 Cup (B701TH26.5E) pressurized?
No — it is a non-pressurized (single-wall) basket, for freshly ground coffee.
Does the IMS B70 Competition 1 Cup (B701TH26.5E) 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 IMS B70 Competition 1 Cup (B701TH26.5E) fit?
Breville Oracle; ECM Estetika; ECM Mechanika MAX II; La Marzocco GS3; La Marzocco Linea Micra; La Marzocco Linea Mini; Lelit Bianca (PL162T); Lelit Elizabeth (PL92T); Lelit Kate (PL82T); Lelit MaraX (PL62X); Lelit Victoria (PL91T); Rancilio Silvia; Rancilio Silvia Pro; Rancilio Silvia Pro X; Rocket Espresso Appartamento; Rocket Espresso Epica; Rocket Espresso Giotto Fast; Rocket Espresso Mozzafiato Fast; Rocket Espresso Porta Via; Rocket Espresso R Nine One — each confirmed against manufacturer sources (listed below).
Sources
https://imsfiltri.com/prodotto/b701th26-5e/(archived) — Official IMS Filtri product page ('B70 1 Cup - H26.5 Competition'), read firsthand 2026-07-05. Specs verbatim: 'Border: Ø 70 mm', 'Body: Ø 60 mm', 'Height: 26.5 mm', tamper 'Ø 58/58.4 mm', ridge 'External Ø 60.5 mm', 253 holes of Ø 0.30 mm in a hexagonal pattern over a Ø 30 mm perforated area. Capacity 8.5/10.5g (dark roast) to 10.5/13g (light roast) — a single-dose basket with 'a specialized shaft shape' for 'a higher coffee puck, similar to 2-cup versions'.
https://www.imsfiltri.com/IMS-competition-Catalogue.pdf(archived) — Official IMS Competition Series catalogue, read firsthand 2026-07-04, whose 'For tamper 58 / 58.4' B70 compatibility list names La Marzocco, Rancilio, Lelit, Rocket, ECM and 'BREVILLE (The Oracle)' among the fitting brands; Gaggia is assigned to the narrower B68 series.