Plastic Test Tube Rack for 15/18 mm Tubes, Hole Diameter is 18.7mm, Holds 50, Detachable, Karter Scientific 208U2 (Pack of 1)

Not the most sturdy item ever, but I appreciate the fact that it can be stored flat and works as intended. I'm using it to store 5ml vials that contain sample sizes of fountain pen ink. This holds twice as many vials as the (admittedly nicer) acrylic model I was looking at elsewhere, but costs nearly two-thirds less and fits my available space better. I love it when I can avoid the "hobby item mark up" by finding the non-hobby item that does the same thing just as well or better.

Affordable, functional.

This is a cute shelf and great for chapstcks.

I bought two of these test tube trays to store and organize the seed beads I use for jewelry making. They were a bit tricky to assemble since there are no directions included in the package, but they slide together pretty easily once you figure out which way is up! They are fairly sturdy for plastic, though I noticed a slight bowing in the middle once I filled it with seed bead tubes. The stand has three layers of holes with a smallest hole at the bottom to keep tubes steady. The stand holds 50 round-bottomed seed bead tubes perfectly! The plastic sides have a slot for your fingers, making it easy to transport. One of things that I don't particularly care for is the tendency for the individual layers to slide or "recline", making the test tubes hard to remove. Just make sure the tray is in an upright position before attempting to remove a tube or you might have a mess to clean up like I did! :) Will order again when the need arises and would recommend to others. NOTE: This item is just a tray and does not include storage tubes.

It worked really well with my project. A little hard to put together but it works well after you put it together

I got this to use for holding test tubes for my aquarium API tests. It works great. There are no instructions but basically, you just slide the racks into the little stands. The backside of the shelves have 2 little clear dots to stop from sliding too far. Once I got the first one on (the bottom rack), the others were easy. I did put a drop of cooking oil on the stand where you slide it on, as they wanted to hang up. And one I had to slide back and forth a few times until it would slide on easily. You just have to remember to put the side without the clear dots (stoopers?) in first. It's not real sturdy, but plenty enough for holding test tubes. Well worth the $6.49 I paid. It is larger than I need, but it will make the process so much easier. I guess if you wanted it a little more sturdy you could put a drop of glue on the stands. But not necessary at all. They hold well, even when carrying empty. I wouldn't carry it full of test tubes.

For what I needed it for this was the perfect storage solution. I am a niche fragrance lover with a Scentbird subscription. But perfumes (and other beauty products) do best stored out of bathrooms where there's too much moisture and light so I have a Sterlite drawer system in my dressing area to keep them safe. But with a collection this large and fragile I had experienced leaks and damage over the years, especially with the new spherical bottomed tube that can't free stand. Scentbird sells beautiful storage options but they are expensive ($45ish) and only hold 16 vials. I wanted something much more practical and realized a simple plastic test tube rack would be perfect. This one fit my budget and was minimalistic which I liked. The only thing I didn't love was that I had trouble putting it together. User error on my part I think but worth noting that you should read the instructions carefully because it's a little confusingly worded. If you're in need of a storage solution like I have going check out my photos for an idea of how it's working for me.

Good