Ackers Science Plastic Test Tube Rack for 13/16 mm Tubes, Holds 50, Detachable (Single)

I did not have assembly issues like others complained about. Shelves are snug and there were no burrs interfering with assembly. End plates will flex out of alignment when trying to slide in shelves, but just be careful and there should be no issues. W just a little care, No reason to break! Individual pieces are strong enough that I would not worry about breakage unless handled negligently. I was a manufacturing engineer for 25+ years and I would say these are good quality design, materials and fabrication. I approve! As you can see in the pictures, I am using it to hold 5ML cryo sample vials. My vials are short and hang by the cap when rack is assembled as intended. This is great for storage in the freezer. When filling and using vials, I can swap the bottom and center plates and use the rack right-side up or upside-down depending on how tall I want the vials sticking up above the top of the rack. I prefer up-side down. it holds the vials a little more securely. The vials can be stood upright or held in the rack in a back leaning angle to facilitate reading of any labels. FYI - My vials are 16mm vials and I was concerned the fit might be tight; especially with the raised volume indicator marks on the outside of the vials. But clearance is perfect. Good purchase and you can't beat the price.

I bought the 15/18mm (pack of 2) to store my fountain pen ink samples. It is PERFECT! It comes disassembled, flat, and assembling it is not difficult. It is sturdy enough (compared to another one I had in the past) and the size is just right. I'm even happier since the listing says 40 holes, and I got the 50 hole version - even better!!! I nearly spent double for the Karter brand (which is the current bestseller) but really there was no need, this one is EXACTLY what I wanted. :-)

Firstly, the poor reviews and the correct information: 1-Yes it is cheap and yes is challenging to put together but once done it’s a fine item. 2-Yes you CAN return it. 3-Yes it does what it is supposed to do. I don’t do reviews unless I find enough incorrect information to provide correction. I used this for desktop ink pens and it works fine. Two of my negative remarks: it does not fit pens with clips on the side which have to be placed upside down to fit and there is no bottom so pens fall out when the unit is moved or lifted. That’s it for a cheap handy little tool that does what it advertises.

It does work as described and seems sturdy enough.

4 out of 5 stars because it's quite flimsy but for the price it's okay.

I use this for the pretzels to cool down on and I feel that it was a nice size but also I feel that I might have done a little bit too much chocolate so the pretzel sticks didn't really fit. I probably might buy more for if I do make any more chocolate covered pretzels even though this is meant for test tubes it fits the pretzels really well.

I Love this for the pretzels! Thank You!

Once you put this flat pack shipped package together, you have a nice looking and sturdy vial holder. The light blue transparent horizontal pieces provide enough contrast to see where the holes are at, but not so opaque that it distracts from seeing the vials (labels on vials if you label them). Don't be fooled by how the plastic seems to flex if you put pressure in the middle (if you are used to the old wooden or metal test tube holders from you school chemistry days). Testing with filling all slots with vials filled with water, everything was held without fear of the holder breaking. Only bad thing on my unit was that one of sprues from the injection molding was not trimmed close enough to make one of the horizontal pieces not quite fit in. A little filing easily fixed that issue.