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Quality Control Process Guide for Air Bar Nex 4

Published 2026 · VapeWholesaleHub trade desk

Quality control is where a Nex 4 order either protects or damages downstream relationships.

Across the trade, quality control process is the point where good intentions meet operational reality on the Nex 4.

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

Why quality control process matters on the Nex 4

Incoming inspection sampling catches most issues before they reach shops.

Seasonality interacts with quality control process more than most forecasts allow for, so a rolling review beats an annual one.

Functional testing of a sample from each batch is standard practice.

Reference specification

Item	Value
Model	Nex 4
Brand	Air Bar
Category	Local Supply
Battery	400 mAh
Output range	10-40 W
Capacity	4.0 ml
Charging	USB-C 2A
Coil options	0.8 / 1.2 ohm
Carton quantity	120 units

Documented defect rates make supplier conversations objective.

Practical notes for buyers

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

Documentation is not paperwork for its own sake; on quality control process it is the difference between a clean clearance and a delayed one.

Checklist

Retain one sealed sample carton from every batch for reference.
Log sell through by account for the first eight weeks.
Request batch photographs and a packing list prior to shipment.
Verify that artwork matches the approved compliance template.
Agree in advance who pays for return freight on a defect claim.
Review the reorder point after one full selling cycle.

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 (143 units)	Tier 1	14-21 days
Pallet (789 units)	Tier 2	7-12 days
Container (12375 units)	Tier 3	7-12 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 defect rate is acceptable for Nex 4?

Industry practice works to a low single digit per thousand, with dead on arrival units replaced.

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.

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.

Can packaging be adjusted for our market?

Artwork localisation is straightforward; structural changes need larger volumes and a longer lead time.

Final word

A short quarterly review of these points will keep the Nex 4 range healthy without consuming the week.

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