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.

Item is as advertised and arrived on time.

The holes are way too big for the teeth whitening pen I need to fill with gel. Nothing is wrong with the purchase except they do work work with my teeth whitening pens.

It was really hard to put together.... maybe it was an operator error lol.

I have four of these racks. I make jewelry with seed beads, and these racks are the perfect size to store the tubes of beads and keep them organized.

Buen material y. Buen tamaño

Fast shipping and it's just perfect.

I ordered the 18.7mm hole size rack after being thrilled with the 18.7mm hole size one that I purchased back in July from the same listing. When this one showed up today the holes are more like 17mm. I can't use it for the intended purpose but I have another purpose I can use it for so I'm keeping it, but please be aware that you might not get the hole size you think you are. It's easy to put together and sturdy - but the one that arrived today is the wrong hole size and now I have to figure out how to get the correct hole size, likely from another source - "fool me once..." and all that.