The 24.5mm single-dose B70 basket — 2mm shallower than the B701TH26.5E and
with the ‘Normal’ 177-hole pattern rather than the 253-hole hexagonal one, so
a lower flow rate for the same ~9-11g dose. Same official B70 compatibility
list as the other B70 entries. Verified against the official IMS product page
and catalogue on 2026-07-06.
FAQ
What size portafilter is the IMS B70 Competition 1 Cup H24.5 (B701TH24.5N) for?
It is a 58mm basket, 24.5mm deep, for 58mm portafilters.
Is the IMS B70 Competition 1 Cup H24.5 (B701TH24.5N) pressurized?
No — it is a non-pressurized (single-wall) basket, for freshly ground coffee.
Does the IMS B70 Competition 1 Cup H24.5 (B701TH24.5N) 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 H24.5 (B701TH24.5N) 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://www.imsfiltri.com/filters/B701TH24.5N.html(archived) — Official IMS Filtri product page ('B701TH24.5N FILTER BASKET' — 'B70 1 Cup - H24.5 Competition'), read firsthand 2026-07-06. Specs verbatim: 'Border: Ø 70 mm', 'Body: Ø 60 mm', 'Height: 24.5 mm', tamper 'Ø 58/58.4 mm', ridge 'External Ø 60.5 mm', 'Holes: 177 (Normal pattern)' of Ø 0.30 mm over a Ø 30 mm area. Capacity 8.5/10.5g (dark roast) to 10.5/13g (light roast); 'designed to accommodate a higher coffee puck, similar to a 2-cup basket' via 'a specific curvature radius that balances the increased height with optimized capacity.'
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.