Conical Centrifuge Tubes 50mL, [100 Pack] Plastic Test Tube with Screw Caps, 50mL Sterile Test Tubes with Lids, 50 mL Falcon Tubes with Printed Graduation and Write-on Spot

A little harder to cap one-handed than the model without a "safe lock", but otherwise my samples would leak so the inconvenience is worth it for tubes that stay sealed.

This is a great product for my lotion and all samples I will continue to buy this particular product

For my purposes, height and width were important, not just millimeters so here are measurements in case it is that way for you too.These work well and are a nice price compared to others.

No down side. They're sturdy and close tight.

El producto llegó a tiempo y exactamente lo que se había ordenado.

Works very well.

Not much to mention about these as they work perfectly well.Strong body. Cap locks securely. Cap hinge is good. No badly formed molds. Easily marks for labelling. No odor.What I loved is how relatively clear the round bottom is. I have older conical bottom microcentrifuge tubes that are not as clear. With these tubes I can clearly see the sediment or pellet from spun down material.Great tubes for their intended purpose. Great for containing small items as well like small screws, precious stones, beads, glitter, etc.

These test conical centrifuge tubes are autoclavable and have screw caps which seal well. They come sterile, have write-on spots for labelling—and—you get 50 of them for the price! This is a great deal. I haven't seen a single issue with quality on any of these tubes and they all seal well and are identical. Really great price for these and they should last a long time. I'm impressed and will likely be getting more of these!