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

This tube rack is awesome! It is sturdy and durable. I do not have to worry about the tubes tipping over which is so nice. I appreciate the high quality for the price. Great option for a rack tube.

Exactly as described. Working perfectly for my new diamond art projects. The rack with plastic tubes make it easy to see different colors that I’m adding to clothes

Fits plenty of ink samples and is plenty sturdy for my needs. Makes it easy to store my samples in an organized way compared to the way I had them before. A bit finicky to put together but easy enough.

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.

This item works great for holding blood tubes and specimen tubes if various sizes. It works great for my large animal veterinary practice needs! It also shipped and arrived within a couple of days. Thanks!

Great for storing my ink samples. It arrived in perfect condition and wasn't difficult to put together. It just took a bit of wiggling and gentle pushing. Once together it is sturdy and i can lift the whole thing easily. It is just under 3 inches tall with the ink vials in it, so fits perfectly on my desk shelf. Great value.

I was looking for something to hold my fountain ink samples, as they keep growing. I tried to order it from my favorite fountain pen shop... Shout out to the Goulet Nation!! But it's sold out on their website. I'm becoming a part of that ink sample life. But it's the way to go in my humble opinion because I've bought bottles of ink, only to get them and not like it once I begin using it in one of my pens. For example, my husband bought me a beautiful Benu pen that actually glows in the dark, and the pen is purple, so I inked it up with a beautiful purple shimmer ink sample I received. Well let's just say, don't use a shimmer ink in any nib smaller than medium because it clogged my pen like you wouldn't believe. So if I had bought an entire bottle of that ink specifically for that pen, it would have been a waste. So since it was sold out on their site, I came to my trusty friend called Amazon and found a very similar one, I just had to check their site to make sure I got one with the correct dimensions. I hated not being able to purchase from them, but I seriously needed a quick organizational system because I just received another set of samples and have more on the way. I did have some trouble putting it together, but once I figured out how it worked, it was super easy. So all this to say, it's perfect for ink samples!

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.

Just want to thank you the stand is really sturdy and nice looking easy to assemble.. so pleased can do my api tests without the test tubes breaking and rolling away!!!

Perfect for their purpose!

Sturdy and as expected!

I bought this to hold tubes of seeds beads and it works perfectly! Nice and sturdy and can take apart again if need be

I bought this to store 2ml vials of perfume samples and it’s perfect. Some of the shorter vials don’t stick out of the top very much but I don’t have any difficulty pulling them out. This product was easy to assemble, took less than 5 mins.