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Air Bar Diamond 4: Supplier Audit Checklist for Distributors
Published 2026 · VapeWholesaleHub trade desk
A supplier audit checklist turns impressions of a Diamond 4 factory into comparable data.
What follows is a practical view of supplier audit checklist for the Diamond 4, written for people who place repeat orders rather than one off buys.
Keeping a short internal note on supplier audit checklist for each SKU pays for itself the first time a dispute arises over the Diamond 4.
Why supplier audit checklist matters on the Diamond 4
Production capacity, quality records and certification should be verified on site.
Freight consolidation changes the answer to supplier audit checklist at container scale, which is why small and large buyers reach different conclusions.
Traceability of raw materials matters increasingly to downstream buyers.
Reference specification
| Item | Value |
|---|---|
| Model | Diamond 4 |
| Brand | Air Bar |
| Category | Box Mods |
| Battery | 1000 mAh |
| Output range | 12-30 W |
| Capacity | 4.0 ml |
| Charging | USB-C 1A |
| Coil options | 0.8 / 1.2 ohm |
| Carton quantity | 120 units |
Re auditing annually keeps the relationship honest.
Practical notes for buyers
Cash flow is the quiet constraint behind supplier audit checklist: the cheapest option is rarely the one that frees the most working capital.
The most common mistake is optimising for the first order instead of the fourth, which is where Diamond 4 economics actually settle.
Checklist
- Log sell through by account for the first eight weeks.
- Retain one sealed sample carton from every batch for reference.
- Request batch photographs and a packing list prior to shipment.
- Agree in advance who pays for return freight on a defect claim.
- Check carton quantities against the commercial invoice line by line.
- Keep certificates current and filed against the exact model name.
Commercial terms
Commercial terms are usually agreed in three parts: a deposit on confirmation, a balance before shipment and a stated validity window.
Freight terms should be named explicitly, because an unclear incoterm is the fastest way to lose a relationship.
| Volume tier | Indicative unit level | Lead time |
|---|---|---|
| Carton (139 units) | Tier 1 | 30-45 days |
| Pallet (1238 units) | Tier 2 | 21-30 days |
| Container (11170 units) | Tier 3 | 14-21 days |
Frequently asked questions
What should a Diamond 4 supplier audit cover?
Capacity, quality control records, certifications, traceability and after sales responsiveness.
Can several models be mixed in one shipment?
Yes, mixing models and flavours within a carton or pallet is common and usually helps first time buyers test demand.
Can packaging be adjusted for our market?
Artwork localisation is straightforward; structural changes need larger volumes and a longer lead time.
How quickly can a repeat order be produced?
For established configurations production typically runs two to four weeks, with transit on top depending on the chosen method.
Final word
None of this is complicated, but it does need to be written down and reviewed on a schedule.
Trade enquiry
Quotations, samples and artwork files are available on request. Please state model, quantity per SKU, destination and target delivery window.
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