Cube 27 mm

Nominally 54 pieces per kilogram, 18.5 g a piece, ±0.3 mm per side. Of the cubes we press it is the second-largest: the sizes below it pack more, lighter pieces to the kilogram, the size above it fewer, heavier ones. The count is taken at the factory when the boxes are filled — a planning figure, not a per-carton guarantee — and the weight per piece is derived from it, not weighed.

By Mohamad Sinno, Charcoal Expert.

Cube 27 mm briquette, macro

The catalogue page for this size is addressable on its own, so the image has to identify the size rather than the shape — the printed label and the scale are what make it self-identifying to a reader and to multimodal retrieval.

The card

Every row names the block it comes from. Where a block records nothing for this size, the cell says so — we do not carry a figure across from the size above it.

Item	This size	Source
Shape	Cube	P28
Size	27 mm (cube, edge length)	P28
Pieces per kilogram	54 — nominal, counted at factory packing	P28
Weight per piece	18.5 g — nominal, derived from the count	derived from P28
Tolerance	±0.3 mm per side	P28
Minimum order	1 × FCL (20 ft or 40 ft); minimum 2 tonnes per shape, size and packaging variant	P8
Inner box, 1 kg	170 × 88 × 88 mm — 1 kg inner duplex 250 gsm E-flute, varnished, CMYK	P30
Master carton	Not recorded — ask the export desk	P30
House-brand retail boxes	Not recorded — ask the export desk	P38
Master carton mark	Our master cartons carry a UN 4G fibreboard-box mark of a packing-group-III design. The packaging certificate is available to buyers on request.	P57
Carton code	a four-digit batch production code, two letters identifying the packing team, and one check digit. Inner-box marking: not recorded.	P48

Grades and price basis

Grade	Ash ceiling	Boxed, USD/t	Bulk, USD/t
Diamond	1.2–1.6%	1900	1820
Platinum	1.6–1.9%	1800	1720
Super Premium	1.9–2.3%	1750	1670
Premium	2.3–2.5%	1700	1620
Regular	2.5–3.0%	1650	1570

FOB Tanjung Priok · Prices valid September 2026 · reviewed monthly. These prices are indicative and dated, not an offer. A binding figure comes on a proforma invoice against your shape, size, packaging and destination.

Ash is the band that names each grade, and the batch certificate is what proves it. Size does not change the per-tonne price — see wholesale pricing.

What the laboratory measured

Ash, fixed carbon, volatile matter and moisture are reported per batch on a certificate of analysis — what one proves, and how to verify the laboratory.

What is not measured per size. Burning time, ash colour and breakage rate are recorded per batch, not per size, so this page publishes none of them against 27 mm. Burning time in particular has no stated test conditions here — the method page sets out what any minutes figure has to name before it means anything, ours included.

Drop test rig

A drop test estimates handling durability by dropping pieces from a fixed height onto a hard surface and counting what breaks, and it is only comparable when the height and piece count are stated.

What fits in a container

Equipment	Payload	Master cartons
20 ft	19.5 t	1,950 — counted
40 ft	26.5 t	2,650 — derived

A 20 ft cubes out before it weighs out and a 40 ft weighs out before it cubes out, which is why the 40 ft figure is the same for every shape. Stowage: cartons go inside a thermal blanket, vacuum-sealed, 15–30 cm of headspace and 30 cm at the door. The cargo ships as UN 1361, Class 4.2, Packing Group III — how it is declared and booked, and what a container costs to move.

Pallet plan: on request. The pallet configuration for this size is not recorded on our data sheet yet, so there is no diagram here to show you.

Carton marking station

Transport marks on the carton are what tie a physical box to the packing list and the transport document, so marking is a documentation step as much as a packing one.

Packaging routes

Your own design, a house-branded box, a plain box or bulk: every packaging route, box dimensions in the formats matrix, and your own brand through the private-label programme.

Sample this size, then quote it

How sampling works, and on what terms; the window for quality and quantity claims is set out in our quality guarantee.

Quote cube 27 mm on WhatsApp

Questions buyers ask about the cubes

Is the piece count guaranteed per carton?: No. It is a nominal packing count, counted at the factory when the boxes are filled, and it moves with density and moisture on the day. Treat it as the planning figure it is — if your retail pack states a count, ask us to confirm against the batch you are buying.
Can I order one size only, or do I have to mix?: Either. 1 × FCL (20 ft or 40 ft), and inside it the minimum is 2 tonnes per shape, size and packaging variant. So a single-size container is fine, and so is a container split across sizes and packaging as long as each variant reaches two tonnes.
Why is there no burn time on this page?: Because the test conditions behind a minutes figure are not written down here, and a number without them is not a specification. Burning time is recorded per batch in the factory QC file; what is missing is the ambient, the burner type and the single-piece-versus-bowl basis that would make one comparable to anyone else's.
What does the price depend on?: Grade and packaging. The five bands below are ash ceilings, and each has a boxed price and a bulk price; the basis is FOB Tanjung Priok. Shape and size do not move the per-tonne price — they move how much fits in the container, which is the section above.
Can I have my own brand on the box?: Yes. Minimum 2 t per SKU (≈2,000 inner boxes or 200 masters at 1 kg) applies, plate and setup are inside the quoted price, and artwork goes through the dielines we supply. House-branded boxes are the faster route where they exist in your size.

The other cube sizes

Size	Pieces per kg	20 ft payload
Cube 22 mm	96	not recorded
Cube 25 mm	72	20 t
Cube 26 mm	64	20 t
Cube 28 mm	48	19.5 t

Every shape and size we press: the catalogue. Choosing between formats rather than sizes: shapes and sizes compared.