Treatment Pumps: What Fits, and What Fails
By Joe Joo · 8PCK · Shantou · Updated 26 October 2026
Treatment Pumps in 18/410, used for serum and eye cream. The specification question is a pump that doses 0.5 ml when the label says 0.3.
Small-dose pumps are specified by output, not by neck.
We supply treatment pumps for serum and eye cream, tested on the bottle rather than shipped loose.
The free Bottle Spec Checker tests whether your neck fits the closure and whether the wall survives a pump stroke.
30-second check: does your bottle pass? Open ▾
What Fits
Treatment Pumps come in 18/410, 20/410. Choosing the neck first cuts the range to two or three options, and the rest is dose, finish and liner.
The failure we see most is a pump that doses 0.5 ml when the label says 0.3.
The Neck Rule
Diameter plus thread: 410 and 415 are not interchangeable.
Testing
Fitted and leak-tested on the filled bottle before packing.
Where It Fails
A pump that doses 0.5 ml when the label says 0.3. That is decided by the specification, not by the mould.
Ask for a filled sample left on its side for 48 hours before approving.
What to Send in a Brief
Neck, closure type, product viscosity and quantity. Those four answers are enough to quote.
Ordering Closures Without Ordering the Wrong Ones
A closure is only as good as the bottle it is tested on. Two suppliers can each be within tolerance and still leak as a pair, so the test has to be on the filled pack.
Send the Bottle, Not the Drawing
Dimensions do not capture thread start or the sealing land.
Send the Product
A gasket that passes with water can swell in a week with a solvent.
Agree the Sample
Keep one filled, approved sample as the reference for the production run.
Cost and Lead Time
Closures are quoted per 1,000 pcs and up, with a separate tooling cost only if the shape does not exist. Standard caps and pumps are stock items; anything moulded for you starts at 3,000–5,000 pcs.
Questions We Get on This
What neck does a treatment pumps fit?
18/410, 20/410.
What is the MOQ?
1,000 pcs on existing moulds.
Can you test it with my formula?
Yes — send 200 ml of the product and we test the closure on it.
Is it supplied fitted?
Yes, fitted and leak-tested before packing.
Do you supply closures separately?
Yes, but they are tested on the bottle before they ship.
What if my bottle is from another supplier?
Send a sample; we test the closure on your bottle.
Can you match a colour?
Yes — closure and bottle can be colour-matched from a Pantone reference.
Sizes That Fit This Guide
Get a Price on This, Within One Business Day
Tell us the capacity, the neck and the quantity. You get unit price, lead time and a sample plan — not a catalogue.
Every batch is gauged at the neck and weighed. The documents travel with the shipment.