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Air Bar Diamond 4 Supplier Audit Checklist for Bulk Buyers

Published 2026 · VapeWholesaleHub trade desk

A supplier audit checklist turns impressions of a Diamond 4 factory into comparable data.

Distributors reviewing their Diamond 4 range usually find that supplier audit checklist explains most of the variance in results between accounts.

Documentation is not paperwork for its own sake; on supplier audit checklist it is the difference between a clean clearance and a delayed 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	E-Liquids
Battery	400 mAh
Output range	5-40 W
Capacity	6.0 ml
Charging	USB-C 2A
Coil options	1.0 / 1.2 ohm
Carton quantity	200 units

Re auditing annually keeps the relationship honest.

Practical notes for buyers

A written internal standard for supplier audit checklist makes onboarding new account managers far quicker and reduces avoidable errors.

In practice the decision comes down to three numbers: unit cost, freight per unit and the realistic sell through rate for Diamond 4.

Checklist

Agree in advance who pays for return freight on a defect claim.
Log sell through by account for the first eight weeks.
Keep certificates current and filed against the exact model name.
Verify that artwork matches the approved compliance template.
Request batch photographs and a packing list prior to shipment.
Record the arrival condition with photographs on the day of delivery.

Commercial terms

Payment history is the single most reliable route to better terms, more than total annual volume.

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 (126 units)	Tier 1	14-21 days
Pallet (616 units)	Tier 2	30-45 days
Container (10610 units)	Tier 3	30-45 days

All figures above are indicative working ranges used for planning. Final specification and commercial terms are confirmed in writing before any deposit.

Frequently asked questions

What should a Diamond 4 supplier audit cover?

Capacity, quality control records, certifications, traceability and after sales responsiveness.

Do you support long term supply agreements?

Yes, rolling agreements with defined review points work better for both sides than rigid annual commitments.

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.

Is documentation provided for customs?

Commercial invoice, packing list and the relevant certificates are supplied; the importer's broker handles the declaration.

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.

Tel: +86 13711127975WhatsApp: +86 13711127975WeChat: +86 13711127975