Home › Flavours › Nex 4
How to Source Air Bar Nex 4: Quality Control Process
Published 2026 · VapeWholesaleHub trade desk
Quality control is where a Nex 4 order either protects or damages downstream relationships.
Buyers who treat quality control process as a commercial discipline rather than an afterthought tend to hold margin for longer.
Where two suppliers look identical on price, quality control process is usually the variable that separates them over a full year.
Why quality control process matters on the Nex 4
Incoming inspection sampling catches most issues before they reach shops.
Shops that receive a short briefing on quality control process convert noticeably better than shops that only receive stock.
Functional testing of a sample from each batch is standard practice.
Reference specification
| Item | Value |
|---|---|
| Model | Nex 4 |
| Brand | Air Bar |
| Category | Flavours |
| Battery | 900 mAh |
| Output range | 8-40 W |
| Capacity | 1.2 ml |
| Charging | USB-C fast charge |
| Coil options | 0.6 / 0.8 / 1.0 ohm |
| Carton quantity | 200 units |
Documented defect rates make supplier conversations objective.
Practical notes for buyers
Cash flow is the quiet constraint behind quality control process: the cheapest option is rarely the one that frees the most working capital.
Cash flow is the quiet constraint behind quality control process: the cheapest option is rarely the one that frees the most working capital.
Checklist
- Log sell through by account for the first eight weeks.
- Keep certificates current and filed against the exact model name.
- Agree in advance who pays for return freight on a defect claim.
- Record the arrival condition with photographs on the day of delivery.
- Retain one sealed sample carton from every batch for reference.
- Request batch photographs and a packing list prior to shipment.
Commercial terms
Freight terms should be named explicitly, because an unclear incoterm is the fastest way to lose a relationship.
Lead times are a function of component availability as much as factory capacity, so buffers should reflect both.
| Volume tier | Indicative unit level | Lead time |
|---|---|---|
| Carton (197 units) | Tier 1 | 30-45 days |
| Pallet (1328 units) | Tier 2 | 7-12 days |
| Container (9795 units) | Tier 3 | 7-12 days |
Frequently asked questions
What defect rate is acceptable for Nex 4?
Industry practice works to a low single digit per thousand, with dead on arrival units replaced.
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.
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.
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.