Wholesale Guide

Mod Emissions and Leak Testing Methods — EU Markets

Published 2026-02-20 · 7 min read · by the VapeWholesaleHub sourcing team

There is no clever trick to buying mod well. There is a short list of things worth checking and a long list of things that distract from them. This page is an attempt at the short list.

Mod product overview — Reference view of the mod line prepared for wholesale evaluation.

Quality Control in Practice

Inspection is only useful if the result is recorded somewhere you can find it later. A mod batch log with weights, codes and measurements turns a future complaint into a five minute lookup.

Train whoever receives mod cartons to note anything unusual at the point of unloading. Damage discovered at the dock is a freight claim; damage discovered a week later is your problem.

Confirm the current customs classification with your own broker.
Plan the switch from air to sea freight before you need it.
Write the complaint threshold into the order terms.
Agree the tolerance band in writing before approving artwork.
Model landed cost, not ex-works price, when comparing quotes.

Freight, Customs and Timing

Model mod freight both ways before choosing a method: cost per unit and cost per week of delay. The second figure is the one that decides whether a cheap option was actually cheap.

Mod logistics and packing — Master carton configuration used for mod shipments.

Reading a Mod Spec Sheet

Revisit the mod specification after every third order. Small improvements compound, and factories take a buyer more seriously when the document has clearly been used.

Reference specification for Mod orders
Product category	Closed pod
Resistance band	0.8 - 1.0 ohm
Capacity tolerance	+/- 5%
Puff count method	Machine cycle 2s on / 18s off
Master carton	100 units
Carton weight	4.4 kg
Shelf life	24 months
Storage	15-25 C, dry, away from direct light

Positioning Mod on Your Shelf

Decide early whether mod is a traffic driver or a margin line in your store. The answer changes how you price it, where you place it and how hard you push it at the counter.

Turning Mod Into Repeats

Online, the listing for mod should answer three questions without scrolling: what it is, how strong it is, and what it tastes like. Everything else belongs further down the page.

Practical Checklist

Ask how the factory measures puff count, then compare like with like.
Check carton dimensions against your freight quote before confirming.
Write the complaint threshold into the order terms.
Agree the tolerance band in writing before approving artwork.
Model landed cost, not ex-works price, when comparing quotes.
Start with a mixed carton and let your own sell-through decide.

Frequently Asked Questions

How do you handle a short shipment?

Cartons are counted and weighed before dispatch and the figures are shared with you. If something is short on arrival, the packing record and the carrier documentation are both available, which keeps the claim straightforward.

Is there a warranty on mod?

Manufacturing defects are covered against the retained sample standard. Normal wear, misuse and damage after opening are not. We publish the threshold in the order terms so both sides know exactly what the claim process looks like.

What if I only need a small first order?

That is normal and sensible. A mixed carton lets you test mod in your own market before committing to a production run, and the specification you approve at that stage carries through to larger orders unchanged.

What does a sample pack usually include?

A typical mod sample pack covers the strengths or variants you are most likely to list, packed so you can evaluate them side by side. Tell us which lines you are considering and we will match the pack to that rather than sending a generic selection.

Next Step

The best mod programmes we see are run by buyers who write things down. Specifications, batch records, complaint thresholds - the paperwork is the advantage.

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