These were a great find to organize and store the various sizes of router bits that I use with my CNC router. The screw-on lids are sturdy, and the rack that holds them works well for organizing the bits
Use these 50mm conical tubes instead of standard test tubes for their diameter and reusability. They are autoclavable for use again and again and simply a dream to use for serial dilution work and creating culture slants that are easily stored and organized.
I use these to germinate seeds - safe, sterile, cost effective, I do have to drill/vent the caps, tagging Seed thru Harvest begins with tagging the tube - the tray is nice too, Excellent!
Excellent product, excellent price. Perfect for cytology specimens.
Product arrived as expected. The caps seem tight. I use them to store seeds and want to keep moisture out. Seed packets get moist here in Hawaii and the seeds don't germinate. Can't say what these tubes would do for any scientific use.