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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.
Across the trade, supplier audit checklist is the point where good intentions meet operational reality on the Diamond 4.
Seasonality interacts with supplier audit checklist more than most forecasts allow for, so a rolling review beats an annual one.
Why supplier audit checklist matters on the Diamond 4
Production capacity, quality records and certification should be verified on site.
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.
Traceability of raw materials matters increasingly to downstream buyers.
Reference specification
| Item | Value |
|---|---|
| Model | Diamond 4 |
| Brand | Air Bar |
| Category | Vape Devices |
| Battery | 1000 mAh |
| Output range | 10-80 W |
| Capacity | 6.0 ml |
| Charging | USB-C 2A |
| Coil options | 0.8 / 1.2 ohm |
| Carton quantity | 240 units |
Re auditing annually keeps the relationship honest.
Practical notes for buyers
The most common mistake is optimising for the first order instead of the fourth, which is where Diamond 4 economics actually settle.
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.
Checklist
- Keep certificates current and filed against the exact model name.
- Retain one sealed sample carton from every batch for reference.
- Agree in advance who pays for return freight on a defect claim.
- Verify that artwork matches the approved compliance template.
- Request batch photographs and a packing list prior to shipment.
- Check carton quantities against the commercial invoice line by line.
Commercial terms
Payment history is the single most reliable route to better terms, more than total annual volume.
Payment history is the single most reliable route to better terms, more than total annual volume.
| Volume tier | Indicative unit level | Lead time |
|---|---|---|
| Carton (136 units) | Tier 1 | 14-21 days |
| Pallet (1884 units) | Tier 2 | 30-45 days |
| Container (18474 units) | Tier 3 | 21-30 days |
Frequently asked questions
What should a Diamond 4 supplier audit cover?
Capacity, quality control records, certifications, traceability and after sales responsiveness.
What happens if a batch fails inspection?
The agreed procedure normally covers replacement of affected units or credit against the next order, documented before shipment.
Is documentation provided for customs?
Commercial invoice, packing list and the relevant certificates are supplied; the importer's broker handles the declaration.
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.
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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