# IMS B64 Competition 2 Cup H19.5 (B642TH19.5N)

> Espresso compatibility data from EspressoFit. Confidence: **manufacturer (Tier 1 — manufacturer primary source read firsthand)**.
> Sources last read firsthand: 2026-08-16.
> Canonical page: https://espressofit.com/baskets/ims-b64-competition-2-cup-h19-5/

## Specifications

- **Diameter:** 57 mm
- **Depth:** 19.5 mm
- **Type:** non-pressurized (single-wall)
- **Brand:** IMS

## Fits these machines

- Lelit Anna (PL41TEM) (57mm portafilter) — https://espressofit.com/machines/lelit-anna/

## Notes

The **shallower** of IMS's two 57mm competition baskets — 19.5mm, against the
[22mm](/baskets/ims-b64-competition-2-cup/). IMS rates it 11.5–13.5 g for a dark
roast and up to 17.5 g for a light one, which makes it the **lower-dose** choice
for a [Lelit Anna](/machines/lelit-anna/).

The B64 family is only two baskets deep:

| Code | Height | Dark | Medium | Light |
|---|---|---|---|---|
| **B642TH19.5N** | 19.5mm | 11.5/13.5 g | 12.5/14.5 g | 15/17.5 g |
| [B642TH22N](/baskets/ims-b64-competition-2-cup/) | 22mm | 13.5/15.5 g | 14.5/16.5 g | 17/19.5 g |

Worth noting how far roast level moves it: the same basket takes **six grams
more** of a light roast than a dark one. If you switch between roast styles, the
19.5mm covers a genuinely useful range on its own.

## Geometry, and the N pattern

Ø64mm border, **Ø58mm internal body**, ridgeless, for a Ø57mm tamper — and 349
holes in IMS's **M pattern** over a Ø44mm perforated area, described as
"Relaminated and Recalibrated". The recalibration step is what separates the
competition line from IMS's standard baskets: it tightens the tolerance across
every hole so flow stays even rather than running fast in patches.

Note the border figure. At Ø64mm this is a **different series** from the Ø70mm
B70 baskets used by 58mm machines — which is precisely why a "58mm" basket will
not seat in an Anna regardless of what a listing claims. See
[why 58mm isn't one standard](/guides/58mm-is-not-one-standard/).

Pair it with the [LELIT57 tamper](/parts/lelit-lelit57-tamper/), the
[LELIT57 bottomless holder](/parts/lelit-lelit57-bottomless-filterholder/) or a
[57.5mm puck screen](/parts/normcore-ultra-slim-puck-screen-57-5mm/).

## Sources

- https://www.imsfiltri.com/filters/B642TH19.5N.html
  - Official IMS Filtri product page ('B642TH19.5N'), read firsthand 2026-08-16. Specs verbatim: 'Border: Ø 64 mm', 'Body: Ø 58 mm Internal', 'Height: 19.5 mm', 'Tamper: Ø 57 mm', 'Ridge: Ridgeless', average capacity '14/16 gr'. Perforation verbatim: 'Hole Pattern: 349 M pattern', 'Perforated Area: Ø 44 mm area optimized', 'Hole Diameter: 0.30 mm', 'Competition Perforation: Relaminated and Recalibrated'. The page's capacity table covers the whole B64 family — 'B642TH19.5N 19.5 mm 11.5/13.5 gr 12.5/14.5 gr 15/17.5 gr' and 'B642TH22N 22 mm 13.5/15.5 gr 14.5/16.5 gr 17/19.5 gr' — i.e. two heights only. Testing basis stated verbatim: 'Dark roasted (80/20 blend), Medium (100% Arabica), Light (Ethiopia single origin).'
- https://www.imsfiltri.com/IMS-competition-Catalogue.pdf
  - Official IMS Competition Series catalogue, read firsthand 2026-07-13, whose B64 series is headed 'for tamper 57' — the 57mm format used by Lelit's LELIT57 group.

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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.