Kashi Scientific 15mL Screw Cap Conical Centrifuge Tubes, Sterile Test Tubes with Blue Lids, Lab-Grade Polypropylene Plastic, Printed Graduation and Write-on Spot [15mL, 50]

These are good quality and they come in a sealed bag which keeps them sterile. I purchased them to be used as slants for mycology work but they were too small to work with.

These get the job done. I did have a few explode on me in a 10000g centrifuge, but it may be my fault for leaving a non polar solvent in them for too long. Unless proven otherwise, 5* for good value.

wrong size shiped, but works well.

Perfect for using with students in elementary school

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!

If you are looking for tubes to make mycology storage slants.... here they are. These are very well made, have embossed lettering and solid seal caps. PLUS... they come sterile. This is what you are looking for. I recommend the Kashi Scientific Conical Centrifuge Tubes.

Marvelous for storing collected seeds! You can write on the tube or use a label. There they all are, safe and sound till next season.

These centrifuge tubes are nice and clear plastic with good ml markings up the side and fit perfectly into the centrifuge at school where I plan to do some separation labs with them in the future. The caps screw on easily as well.