What diameter are the tubes, and will they stand up in a test tube holder with 16mm holes?

The replacements are the same size as the originals so will go within the holder

Is there a stand to buy for these vials. I can’t see one on Amazon as the holes are too big for the vials.

Don't really know to be honest. Sorry

If i put 1 in the quantity how tubes wi,l i recueve ?

You will get a pack of 24 tubes with caps

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API Replacement Test Tubes With Caps

Product ID: 52990873

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📏Compact 18.1 x 3.18 cm size

🔒Secure caps for spill-proof testing

🧪24-pack precision test tubes

Description

🧪 Stay ahead in aquatic care with precision-packed test tubes!

LIGHTWEIGHT DURABLE - At just 91 grams, these tubes are easy to carry without compromising on sturdiness.
LEAK PROOF CAPS INCLUDED - Each tube comes with a secure cap to prevent spills and contamination, keeping your tests reliable.
COMPACT PORTABLE DESIGN - Sized perfectly at 18.1 x 3.18 cm for easy handling and storage in your testing kit.
PERFECT API KIT COMPATIBILITY - Specifically designed to fit API liquid test kits, guaranteeing seamless integration.
BULK READY FOR ACCURATE TESTING - 24 replacement test tubes ensure you never run out during critical water quality checks.

These API Replacement Test Tubes with secure caps come in a convenient 24-pack, perfectly sized for API liquid test kits. Lightweight and compact, they provide reliable, spill-proof testing for fish tank water quality, ensuring you maintain a healthy aquatic environment effortlessly.

Specifications

Pet Type	Fish
Product Dimensions	18.1 x 3.18 x 8.89 cm; 91 g
Item model number	32
Allergen Information	Apple Free
Size	24 Pack
Quantity	1
Batteries required	No
Batteries Included	No
Item Weight	91 g

Reviews

W**

fantastic product

Fantastic dint not realise they was made out of glass so now i realise why they bit on expensive side but I'm absolutely pleased with the product very well made and none was broken which is a bonus definitely worth paying the price for what they are api products are the best

17.02.2025

A**S

fantastic

after trying to take the cap off a test tube and taking most of the tube with it a got this replacement pack and it’s absolutely fab. the caps aren’t as tight (but still a perfect seal) so i’m not as worried about them breaking the test tubes as i try to get them open.

30.07.2021

T**E

Great find

Am extremely accident-prone, so am forever dropping and mashing these test tubes. The 24-pack is a great find, will hopefully last for a while.

24.07.2021

W**X

Perfect Spares

perfect set of spares test tubes even if slightly expensive, but good quality and correct size

27.12.2019

M**B

Five Stars

just what I needed

20.03.2018

F**N

They are what they are, but they arrived on ...

They are what they are, but they arrived on time (as they said), neatly packed with all intact.Going to make testing 5 tanks a whole lot easier from now for sure, with plenty to spare.Being glass should last longer than plastic tubes (which get scratched) & certainly easier to clean than plastic tubes (which in the past have also stained).

5.03.2018

G**A

Five Stars

Great, thanks

15.07.2018

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