1510. iM2500. 1535 TRVL. AL2216-0803. 🤨 Peli model numbers look like a secret language — and every week someone asks us to translate: does the number mean the size? Is a 1600 bigger than a 1510? What on earth is the "iM"?
Here is the full decoder — including the honest part most articles skip: some Peli numbers genuinely encode dimensions, and some genuinely do not. Once you know which is which, the whole catalogue clicks into place. 7 answers, and you will never squint at a model number again.
🔢 Cracking the Code: 7 Answers
1. The honest truth first: Protector and Air numbers are names, not formulas
Let's start by killing the most common myth. The four-digit numbers on Protector and Air cases — 1200, 1510, 1535, 1615 — are not a mathematical code for dimensions. There is no hidden centimetre formula; they are model designations that grew with the catalogue over five decades. That is why guessing sizes from arithmetic fails: the number is an address in the family tree, not a measurement. The good news? The tree itself is very readable — see answer #2. 🌳
2. …but the ranges do map to size families
While no formula exists, the numbering follows a practical logic you can actually use. In the Protector line, the low 11xx numbers are the small cases (1150, 1170), the 12xx–13xx band covers compact everyday sizes (1200, 1300), 14xx–15xx is the medium and carry-on heartland (1400, 1450, 1500, 1510), and 16xx–17xx means large equipment and long cases (1670 and friends). The Air line lives mostly in the 14xx–16xx band, mirroring the travel-sized sweet spot. Rule of thumb: within a line, a higher first pair of digits generally means a bigger case — just do not expect it to be linear. 📏
3. "iM" = injection-moulded — the Storm signature
Every Storm case wears an iM prefix: iM2050, iM2100, iM2300, iM2950. It stands for injection-moulded — a nod to the line's manufacturing method and its Hardigg heritage. The digits after the prefix follow the same practical logic as answer #2: iM20xx are the compact cases, iM21xx–iM23xx the small-to-medium band, and iM29xx and up the large wheeled transport formats. See "iM" on a spec sheet, think: Storm family, Press & Pull latches, HPX resin — and if you are curious how HPX stacks up against ABS, polypropylene and polycarbonate, our case materials guide breaks the whole alphabet down. ⚡
4. The numbers that ARE a size code: Peli-Hardigg
Here is where it gets satisfying. The roto-moulded Peli-Hardigg transport cases — prefixes like AL — use part numbers that literally spell out the dimensions in inches: the first four digits are length and width, and the digits after the dash split the height into base and lid. So an AL2216-0803 is a 22″ × 16″ container with an 8″ base and a 3″ lid. Suffix letters add configuration — for example a wheeled build or fork-lift provisions. If you work with Hardigg containers, you can size them from the part number alone, no catalogue needed — it is the same family we put to work in our guide to transport crates for museum exhibits and evacuation. 🧠
5. Footprint siblings — the same job across different lines
The most useful pattern for buyers: several sizes exist as near-equivalents across the families, built for the same job with different DNA. The classic example is the carry-on club — the Protector 1510 and the Air 1535 share the maximum-cabin-size mission (Storm has its own member of that club, too), so choosing between them is a question of line philosophy (weight vs mass vs latches), not size. And whichever sibling you pick, verify your airline's current limits before flying — our guide to cabin luggage dimensions and the 5 traps shops won't mention explains why the centimetres matter. The same sibling logic repeats at other sizes: match the mission first, then pick the family. 👯
6. Suffixes and long SKUs — the configuration layer
One more layer sits on top of the model number: configuration. A suffix like TRVL marks a travel edition — the same shell with a luggage-style interior (lid organizer and packing cubes) instead of foam, as on the 1535 TRVL. And the long SKU strings you see on labels (e.g. 1510-000-110 or IM2050-31001) encode the factory configuration — interior option and colour among them. Practical translation in our shop: most models come as with foam, no foam, with padded dividers or with TrekPak, in your choice of colour — that is the suffix layer, made human-readable. 🏷️
7. How to actually use all this when buying
Three habits that make the numbers work for you. Search by the number — it is the universal ID: a review of a "Pelican 1535" applies 1:1 to our Peli Air 1535, and accessories listed for a model number fit that model everywhere. Never buy on the number alone — always check the interior dimensions on the product page against your gear, because "bigger number" is a tendency, not a promise. And match spares by model: O-rings, latches, wheels and foam sets are listed per model number, which is exactly why the number is moulded into the shell. ✅
🧭 The 30-Second Decoder
- Four digits, no prefix (1510, 1535…): Protector or Air — a name, not a formula; higher band ≈ bigger case
- iM + four digits: Storm line — injection-moulded, Hardigg-born
- AL-style with a dash (AL2216-0803): Peli-Hardigg — the digits ARE the inches
- TRVL and friends: configuration suffixes — same shell, different interior
- Long SKU strings: factory config codes — colour and interior
- Golden rule: the number finds the case; the interior dimensions confirm it
The most-asked-about numbers in the catalogue, decoded and in stock: 👇
✈️ The famous carry-on club
📐 Reading the Range in Practice
Want to see the number bands with your own eyes? Here is one case from each: a low-band compact Protector, the medium heartland, a large Air traveller, and a big iM-prefixed Storm — four numbers, four sizes, one legible system: 👇
🔢 Four numbers, four size bands
Number Found. Now What? 🔍
Next time a spec sheet, a rental house or a colleague throws a Peli number at you, you can place it in seconds: line, size band, configuration. And when the number you need is not obvious — because your gear, not the catalogue, should drive the choice — send us your equipment list. Matching real kit to the right number is the part we genuinely enjoy. 📧
