Your customers judge you on whether the colour they want is in stock today. Your accountant judges you on how much cash is sitting in colours nobody ordered. This package is about that tension.
| Dimension | Options | Multiplier effect |
|---|---|---|
| Material | PLA, PLA+, PETG, ABS, ASA, TPU | ×6 |
| Finish | Standard, silk, matte, dual-colour | ×4 |
| Colour | Typically 10–30 held | ×10 to ×30 |
| Diameter | 1.75mm, 2.85mm | ×2 |
| Spool weight | 1kg, 3kg | ×2 |
Each new colour looks cheap to add and none of them look expensive individually. Twelve months later a large share of inventory value sits in lines that turn once or twice a year, and the fast movers are the ones you cannot afford to restock deeply.
If replenishment takes an unpredictable six to twelve weeks, you must hold enough to cover the worst case. That buffer is a direct function of supplier variance, and it is often larger than the price advantage that made you choose that supplier.
Your customer bought grey in March and grey in July and they do not match. For a distributor this is worse than for a farm — you cannot explain lot variation to a retail buyer, and you are left with stock you cannot sell as the same product.
You do the local marketing, translation, support and returns handling. Then end customers discover they can buy the same spools directly from the factory storefront, cheaper, because that channel carries none of your costs.
A customer returns a tangled spool six weeks after delivery. Your supplier's claim window closed at thirty days, or requires the goods returned to Asia at a cost exceeding their value. You take the loss.
Filament is the obvious product and the crowded one. Nozzles, build plates and hotend spares are bought more often per customer, carry single-unit minimums, and are far less price-transparent because fitment matters more than brand.
| Tier | What to carry | Stocking policy |
|---|---|---|
| Core | PLA and PETG in 6–10 mainstream colours, 1.75mm, 1kg | Deep stock, never out |
| Secondary | ABS/ASA, TPU, silk and matte finishes in the popular colours only | Modest stock, restock on trend |
| Long tail | Engineering grades, unusual colours, 2.85mm | Indent or minimal stock — quote lead time honestly |
| Parts | Nozzles, build plates, hotend spares for the top 3–4 printer families locally | Deep stock — low cost, high repeat frequency |
| Own brand | One or two lines under your label once volume justifies it | Committed volume; protects margin and territory |
Fewer than instinct suggests. Filament SKUs multiply across material, finish, colour, diameter and spool weight, so a catalogue described as "six materials and twenty colours" becomes hundreds of stock lines. Carry the top movers deep, hold the long tail thin or on indent, and set an explicit limit on how many lines you add per period.
Lead time consistency usually matters more. Unpredictable replenishment forces you to hold buffer inventory sized to the worst case, and the carrying cost of that buffer frequently exceeds the unit price advantage that led you to the supplier. Negotiate a committed window rather than a shorter but variable one.
Raise it before the first order. Full exclusivity is rarely granted on commodity grades because the supplier gives up too much. A private-label line under your own brand solves the problem structurally instead — the SKU does not exist anywhere else, so there is nothing for a customer to price-compare against.
Usually yes. Parts carry single-unit minimum orders, so range breadth is cheap to build, and they are bought more frequently per customer than filament. They are also far less contested — in a July 2026 survey of 41 supplier storefronts, 25 sold filament while only one specialised in parts. Organise the range by the printer models your customers actually own.
Whoever failed to negotiate the claim window. Many suppliers set a claim period from shipping date, which expires before a distributor has sold the goods. Agree a window aligned to realistic sell-through, and agree that photographs plus a retained sample are sufficient evidence without physical return — return freight often exceeds the value of the goods.
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