CertBuy 50ml Plastic Centrifuge Tubes with Screw Cap, CBTONE 50 Pack Self-Standing Plastic 50ml Test Tube Polypropylene Conical Tubes with Cap, Graduated Marks

Perfect for wastewater sampling ! No leak, stay up, fit on rack. 10/10

Fueron lo que pidió mi hermano y todo bien para viales de citología

Outstanding little bottle. We use them for small machine screws and things like that. They hold up well.

5 star means, it is exactly what I expected. If people are looking for something they might (I do) use the "average customer review" display option, and I try to stay in the "most 4 and 5 range," so I wouldn't rate something lower unless there is something wrong with it. I use these, mounted in a larger container and with the tops cut off (usually) as a place to put screwdrivers, files, wrenches, drill bits, etc. Saves having to make a rack with holes in it. I would have preferred tubes without the conical bottom but could not find ones that were short enough and wide enough in any other style. If you want this size, these will work if you aren't average to conical bottoms, or you could leave the top on, saw off the conical bottom, and use them upside down.

We use these weekly for collecting samples and testing. Work well and hold up for what we need them for. We plan to purchase again when time to reorder.