38x200mm Test Tube w/ O-Ring Adapter

SKU: 55912R

Starting from $4.50USD Each

Save More When You Buy More!
EACH $4.50 $4.50 /Unit
Box of 50 $109.00 $2.18 /Unit
Case of 200 $399.00 $2.00 /Unit

These 38x200mm (1.5x8") glass test tubes, have a nominal outside diameter of 38mm. If you have a hole that is slightly wider than the OD of the tube, an o-ring or elastic band, etc. placed under the rim may fix the problem. Rubber o-rings are generally available in hardware or plumbing supply stores.  We do not sell O-rings.

Here are some ideas our customers have told us about how they use these really big test tubes: Test Tube Concrete Vase; Coppercroft Test Tube Vase; Wall Mounted Plant Propagation Station.

What Our Customers Said on Google:
Holly Christensen: "Ordered 15 test tubes. Very well packaged, quick delivery times, high quality test tubes that feel great. Thanks for the great service!"

Kerri Kairdolf said this among other things: Perfect size! Great quality and arrived quickly with no damage. Click on her name to see a beautiful wall mounted display of propagating plants.

More ideas:
Hanging plant propagation holder, wall mounted spice rack or coffee bean display rack. Or, read these 2 blogs: What is a Test Tube Used For? Not Just Labs! & Corked Glass Test Tubes for Chemistry Kitchenware.


Related information or images
In Kits
  • Borosilicate glass: heat-resistant/autoclavable, food & dishwasher safe.
  • 38x200mm tubes have reinforced rims for stoppers
  • 38x200mm tubes have rounded bottoms & require support to stand upright
  • Completely unmarked for decorative use
  • 38mm (~1.5"); 200mm (~8")
  • Tube capacity/volume is ~165mL/5.5 fl. oz

  • Note: Test tube diameter and length is nominal; there can be a variance of as much as +/- 0.5mm. We cannot guarantee they will fit test tube racks or stoppers we don't supply.
Reviews (11)

I purchased 38x200mm test tubes to replace rain gauge tube that broke & I could not locate any other option local/online that would fit the - apparently - special size for the rain gauge. While I was disappointed the test tubes did not have incremental markings (for rain measurement), since the test tube fit the rain gauge perfectly, I was able to transfer markings from prior/broken tube to the new test tube. Subsequently, able to use the new test tube for my rain gauge.

— Sue

These are really high quality and perfect for my propagation wall.

— Erica

Great quality glass, well packaged and just what I needed. Will definitely be buying from indigo in the future.

— Greg
— Indigo:

Thank you for your kind words. Glad we could get you what you needed.


Tubes were correctly size and quantity. Also, very well wrapped to protect from breakage.

— Robert
— Indigo:

Good to know, thanks.


My test tubes arrived quickly and were exactly what I was looking for. Packaged very well for shipping!

— Lauren
— Indigo:

Thanks for letting us know.

I was shocked by how quick my test tubes arrived! I had such a wonderful experience with customer service after there was an issue with my card & bank. Super happy with the quality, my tubes arrived unharmed and well packaged.
— Haley
— Indigo: Thank for for kind words, glad we could help.
Just the right test tube with the quality that I was looking for, they look excellent for my project.
— Mahmood
The test tubes were exactly as described but 3 of the 12 were broken upon arrival. Indigo replaced the broken tubes after I contacted them. Great service!
— Douglas
Product just as expected. Well packaged, flawless customer experience. Thanks! :)
— Zmonde
These test tubes are big and just the size I was looking for for a project. Shipped securely in bubble wrap.
— Christine
These are exactly as stated. Perfect for my project.
— jy
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