# IMS B70 Competition 2 Cup H26.5 (B702TH26.5M)

> Espresso compatibility data from EspressoFit. Confidence: **manufacturer (Tier 1 — manufacturer primary source read firsthand)**.
> Sources last read firsthand: 2026-07-26.
> Canonical page: https://espressofit.com/baskets/ims-b70-competition-2-cup-h26-5/

## Specifications

- **Diameter:** 58 mm
- **Depth:** 26.5 mm
- **Type:** non-pressurized (single-wall)
- **Brand:** IMS

## Fits these machines

- Breville Oracle (58mm portafilter) — https://espressofit.com/machines/breville-oracle/
- ECM Estetika (58mm portafilter) — https://espressofit.com/machines/ecm-estetika/
- ECM Mechanika MAX II (58mm portafilter) — https://espressofit.com/machines/ecm-mechanika-max-ii/
- Flair 58 (58mm portafilter) — https://espressofit.com/machines/flair-58/
- La Marzocco GS3 (58mm portafilter) — https://espressofit.com/machines/la-marzocco-gs3/
- La Marzocco Linea Micra (58mm portafilter) — https://espressofit.com/machines/la-marzocco-linea-micra/
- La Marzocco Linea Mini (58mm portafilter) — https://espressofit.com/machines/la-marzocco-linea-mini/
- Lelit Bianca (PL162T) (58mm portafilter) — https://espressofit.com/machines/lelit-bianca/
- Lelit Elizabeth (PL92T) (58mm portafilter) — https://espressofit.com/machines/lelit-elizabeth/
- Lelit Kate (PL82T) (58mm portafilter) — https://espressofit.com/machines/lelit-kate/
- Lelit MaraX (PL62X) (58mm portafilter) — https://espressofit.com/machines/lelit-marax/
- Lelit Victoria (PL91T) (58mm portafilter) — https://espressofit.com/machines/lelit-victoria/
- Rancilio Silvia (58mm portafilter) — https://espressofit.com/machines/rancilio-silvia/
- Rancilio Silvia Pro (58mm portafilter) — https://espressofit.com/machines/rancilio-silvia-pro/
- Rancilio Silvia Pro X (58mm portafilter) — https://espressofit.com/machines/rancilio-silvia-pro-x/
- Rocket Espresso Appartamento (58mm portafilter) — https://espressofit.com/machines/rocket-appartamento/
- Rocket Espresso Epica (58mm portafilter) — https://espressofit.com/machines/rocket-epica/
- Rocket Espresso Giotto Fast (58mm portafilter) — https://espressofit.com/machines/rocket-giotto/
- Rocket Espresso Mozzafiato Fast (58mm portafilter) — https://espressofit.com/machines/rocket-mozzafiato/
- Rocket Espresso Porta Via (58mm portafilter) — https://espressofit.com/machines/rocket-porta-via/
- Rocket Espresso R Nine One (58mm portafilter) — https://espressofit.com/machines/rocket-r-nine-one/

## Notes

The tallest of IMS's B70 2-cup competition baskets — **26.5mm**, two millimetres
deeper than the H24.5 and the one to reach for if you pull larger doses. IMS
rates it at 18–20g for a dark roast, rising to **22–24g for a light roast**,
which makes it the natural choice for the light, high-dose recipes common in
competition and specialty cafés.

Otherwise it is the familiar B70 geometry: Ø70mm border, Ø60mm body, a 60.5mm
external ridge to seat securely in the portafilter, and 641 holes of 0.30mm in
IMS's M pattern. Same official B70 compatibility as the rest of the series —
E61 and 58/58.4mm-tamper machines from La Marzocco, Rancilio, Lelit, Rocket, ECM
and the Breville Oracle. Gaggia machines take the narrower B68 series and are
deliberately not cross-referenced. Verified against IMS's official product page
and Competition catalogue.

## Sources

- https://www.imsfiltri.com/filters/B702TH26.5M.html
  - Official IMS Filtri product page ('B70 2 Cups - H26.5 M Pattern'), read firsthand 2026-07-26. 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', '641' holes of 'Ø 0.30 mm' in the 'M Pattern'. Capacity 18/20 gr (dark roast), 19/21 gr (medium), 22/24 gr (light). Amazon listing verified firsthand 2026-08-03: 'IMS Competition E-61 Precision Filter Ridged Basket 16/20 gr - B70 2T H26.5 M' — the listing spaces the code as 'B70 2T H26.5 M', i.e. B702TH26.5M, matching this entry. Add-to-cart present, i.e. actually buyable, at the time of checking.
- https://www.imsfiltri.com/IMS-competition-Catalogue.pdf
  - 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 — and 'FLAIR ESPRESSO (58)', which is why the Flair 58 is cross-referenced here; Gaggia is assigned to the narrower B68 series, so B70 baskets do not cross-reference Gaggia machines.

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Compatibility reference, not a substitute for your machine's manual. Every claim above cites the source it came from; see https://espressofit.com/methodology/ for how entries are verified. Corrections: corrections@espressofit.com.