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How to Source Air Bar Diamond 4: Supplier Audit Checklist
Published 2026 · VapeWholesaleHub trade desk
A supplier audit checklist turns impressions of a Diamond 4 factory into comparable data.
The Diamond 4 has settled into a stable position in the range, which makes supplier audit checklist the natural next question for distributors.
The most common mistake is optimising for the first order instead of the fourth, which is where Diamond 4 economics actually settle.
Why supplier audit checklist matters on the Diamond 4
Production capacity, quality records and certification should be verified on site.
Shops that receive a short briefing on supplier audit checklist convert noticeably better than shops that only receive stock.
Traceability of raw materials matters increasingly to downstream buyers.
Reference specification
| Item | Value |
|---|---|
| Model | Diamond 4 |
| Brand | Air Bar |
| Category | Starter Kits |
| Battery | 1500 mAh |
| Output range | 8-60 W |
| Capacity | 1.2 ml |
| Charging | USB-C 2A |
| Coil options | 0.8 / 1.2 ohm |
| Carton quantity | 200 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.
Cash flow is the quiet constraint behind supplier audit checklist: the cheapest option is rarely the one that frees the most working capital.
Checklist
- Agree in advance who pays for return freight on a defect claim.
- Review the reorder point after one full selling cycle.
- Confirm the exact configuration in writing before the deposit is paid.
- Log sell through by account for the first eight weeks.
- Record the arrival condition with photographs on the day of delivery.
- 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.
Currency movement over a ninety day cycle can outweigh the difference between two competing quotations.
| Volume tier | Indicative unit level | Lead time |
|---|---|---|
| Carton (191 units) | Tier 1 | 21-30 days |
| Pallet (1408 units) | Tier 2 | 7-12 days |
| Container (9208 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.
Do you support long term supply agreements?
Yes, rolling agreements with defined review points work better for both sides than rigid annual commitments.
Can packaging be adjusted for our market?
Artwork localisation is straightforward; structural changes need larger volumes and a longer lead time.
Final word
Start with one change, measure it over a quarter, then decide whether it deserves to become policy.
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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