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.

Excelente

Works wonderful for 5ml ink samples! Didn't come with instructions but it was pretty straight forward! I had no issues putting it together wasnt very hard.

4 stars because assembly was difficult. The clear plastic pieces don’t slide easily into the white sides. Lubing the sides of the slides with a little water helped. I ordered this to organize my perfume samples; I ordered the “15/18 mm tubes” size. I put one large-hole slide on top, the small-hole slide in the middle, and the other large-hole slide on the bottom (for the purpose of storing perfume samples, the second large-hole slide won’t get any use). To prevent the slimmer tubes from falling through the small-hole slide, I put strips of scotch tape across the underside of the holes (do this step BEFORE assembly). Having the sticky side of the tape facing up helps keep the tubes in place. Overall I’m happy with this purchase and the rack does what I need it to do.

I use these to organize my fountain pen ink samples. Very easy to assemble, inexpensive and they stack. I would recommend.

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.

Kind of weird to put together, but after it’s done it’s perfect for my Scentbird samples

Well, first off, the color of this product is a very bright, transparent, light teal color. I actually love the color much better than their picture's plain transparent blue. But it's just surprising to receive something that looks totally different than what you expected. I had trouble trying to slide the individual pieces in and had to get some help after 15 minutes of failure. It wasn't super simple to figure out, because the racks only fit in a certain way....but maybe it will be easier for others. Once it was all put together, it seemed ok. The rack holds up my lip balm containers, although it's all pretty flimsy. The thin plastic trays bend up or down very easily with any kind of pressure. I have little doubt that eventually it will break or snap somewhere. This is not stiff or thick or layered plastic at all. But for $6 or $7, it's not too bad. If the price was up above $10, that would be extreme overpricing. I'm a bit disappointed that it holds so few tubes. It just seemed like more in the picture, but I'm sure that's just my bad for not realizing the true size. I put lip balm tubes in several of the rows.. then I placed a few empty 5-10ml round lip balm jars on the extra space on top. But it doesn't stay put well. If I touch the rack, things instantly fall off. This is the cheapest you can go, in terms of plastic durability. A very small child could probably break each rack by himself, without intense pressure. So. This is just ok. But what can you expect for $6 other than a few slices of plastic with holes in them? This will still do its job properly, so no major complaints yet. I had just expected something more solid at the least. But. I DO like the pretty color.... so that's a plus... right?

Sturdy and as expected!

Perfect for their purpose!

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.

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!!!

really good