SimPure Centrifuge Tubes 15mL, Conical Tubes Sterile 50 PCS, Polypropylene, Leak-Proof Screw Caps, Plastic Container with Graduated and Write Marks, Non-pyrogenic, DNase/RNase Free, Human DNA-Free

Worked great for fecal tests at my dog sanctuary. I purchased along with a centrifuge and the product holds up well. The quality of the product is excellent and as described. The amount you get is a great value for the price. They are very easy to use and sealed wonderfully in the centrifuge.

These tubes are perfect for my purpose. They are the perfect size and having the label on them makes it easy to keep track of what I have in them. Though I will be using them for the germinating of my venus flytraps. It's great that they come with the screw on lids. I definitely recommend this product for what ever your needs are from science projects to seed germinating.

Perfect for transportation for AI !

If you don't want to wash the glass tubes and deal with the mess, these are a good option at a cheap price.

Perfect for sample recovery and transport

Good for multiple uses. Durable with easy screw on/off cap. Clear to read markings

Reenactor who found the powder measures for black powder way too expensive. These are easy to use, plenty big/small enough, and priced right.

I use these to store yeast for making beer. In order to do that, they need to be sterilized. I put them in the pressure canner at 15lbs. After the yeast is added, they can be frozen. They hold up well, don't deform under hot or cold temperature, and the cap seems to tighten down hard. Out of the 5 or 6 batches of beer I have made, I haven't had one contamination.The little white paint area you can write on does flake off pretty easily. I'm not sure if it's because of the temperatures or the rubbing alcohol. It's not a big deal because I just add a piece of painters tape to them and write on that.