C25 and C26 usually refer to cube dimensions: approximately 25 × 25 × 25 mm and 26 × 26 × 26 mm. The one-millimetre difference sounds small, but it changes the cube volume, approximate piece count and how the product fits the buyer’s heat-management and packaging system.
Size alone does not determine charcoal quality. Importers should compare C25 and C26 only after confirming the grade, raw material, moisture, ash, fixed carbon, volatile matter and other agreed acceptance criteria.
Verified PT DAN catalogue references
PT DAN’s published shape catalogue lists:
| Cube size | Approximate pieces per kilogram |
|---|---|
| 25 × 25 × 25 mm | 72 |
| 26 × 26 × 26 mm | 64 |
These are reference catalogue figures. Final dimensions, tolerances, piece weight and availability require confirmation and sample approval.
The geometric difference
A perfect 25 mm cube has a nominal geometric volume of 15,625 mm³. A perfect 26 mm cube has a nominal volume of 17,576 mm³, about 12.5% larger.
This calculation describes geometry only. Actual briquette weight and performance also depend on density, dimensional tolerance, composition and processing. Buyers should therefore avoid converting the geometric difference into an unsupported claim about burn time or heat output.
Why approximate pieces per kilogram matter
The reference count is useful for planning how many cubes may fit in an inner box and how frequently a user replaces charcoal. It is not an acceptance result by itself.
During sample evaluation, count representative pieces and record:
- total sample weight;
- number of complete pieces;
- broken or chipped pieces;
- measured dimensions from different parts of the sample;
- observed weight variation between pieces.
The agreed purchase specification should state the counting method and acceptable tolerance if pieces per kilogram are commercially important.
Compare fit with the intended equipment
Importers should test both sizes in the actual market application. A buyer may use foil, a heat-management device or another setup with specific spacing and airflow requirements.
Record whether the cubes:
- fit the intended device without unstable stacking;
- leave suitable airflow around the pieces;
- are convenient for the expected serving method;
- fit the planned retail box and inner packing arrangement.
These are application checks, not universal performance claims. The preferred format can differ between markets and customer segments.
Keep grade and size as separate decisions
PT DAN’s current catalogue lists Shisha Premium and Shisha Medium grades. Both may be discussed in cube formats, but they have different published parameter ranges.
For example, the catalogue lists Shisha Premium ash content at 1.8–2.5% and fixed carbon at a minimum of 75%. Shisha Medium is listed with ash content of 2.5–3.0% and fixed carbon at a minimum of 72%. Both list maximum moisture of 8%.
A buyer should not describe a cube as “premium” merely because it is C26. Grade and dimensions must both appear in the approved specification.
Run a controlled sample comparison
Use the same evaluation method for both samples:
- identify each sample clearly;
- record dimensions and physical condition;
- use the same ignition method;
- use the same equipment and environment;
- record observations at the same intervals;
- allow the samples to cool safely before weighing residue;
- compare the results with the written acceptance criteria.
If a laboratory report or Certificate of Analysis is supplied, check that it is relevant to the sample or batch under discussion. Do not assume that an undated or unrelated report represents the tested sample.
Packaging questions for C25 and C26
Before approving retail packaging, confirm:
- nominal cube dimensions and tolerance;
- target net weight;
- approximate piece count;
- inner-box dimensions;
- protective inner bag;
- master-carton configuration;
- artwork references to size or piece count.
If the package prints a piece count, the parties should agree whether it is exact or approximate and how variation will be managed.
A practical buyer decision table
| Buyer question | Why it matters |
|---|---|
| Which cube fits the intended setup? | Confirms application compatibility. |
| Which grade is being offered? | Prevents size from being confused with composition or quality. |
| What dimensional tolerance applies? | Defines acceptable variation. |
| What is the expected piece count? | Supports pack planning and user expectations. |
| Was the same test method used? | Makes sample comparison more meaningful. |
| Is the packaging designed for that size? | Reduces fit and presentation problems. |
Related buyer resources
- View PT DAN specifications and size references
- Review the sample evaluation checklist
- Learn how to read a COA or laboratory report
- Review packaging options
- Explore shisha and BBQ product options
Conclusion
C25 and C26 describe size, not a complete quality grade. Compare the dimensions, approximate piece count, equipment fit, packaging configuration and verified product parameters together.
PT Dharma Artha Nusantara coordinates specifications, samples and export requirements with selected Indonesian production partners. Contact PT DAN with your preferred grade, cube size, packaging and destination so the requirements can be reviewed in writing.