BIPEE Plastic Test Tubes: Efficient and Detachable Lab & Scientific Products Review

I bought these to hold flower tubes in butterfly habitat. Works great for keeping pipes upright and tidy. I was also able to place small twigs in this rack to keep the twigs strong so the caterpillars can form a pupa or cocoon.

They are good for the price, especially if you use them as intended. Me, a stingy but resourceful ass, refused to use them to store my big Spectrum weapons. They didn't fit. A few of my others did fit though and the bottom hole was exactly the same size as the small bottom cap on the marks so it kept them straight. However, this made me aware that not all holes are the same size - some are much narrower. When trying to pull out a couple of markers that were a bit stuck the plastic cracked and…

I bought this stand to store Goulet Pens ink sample bottles. Goulet Pens sells a similar rack to this one, but it only holds 40 vials, not the 50 bottles on this rack. mm). The outer diameter of Goulet Pens ink bottles is 15.5mm. My guess is that the vials are designed to fit the diameter of a 16mm tube, which seems to be one of the standard tube sizes. If we take into account the thickness of the label glued to the bottle, we get 16.2 mm. The diameter of the holes in this rack is 16.0mm. So it