Kashi Scientific Conical Centrifuge Tubes 15mL, [50 Pack] Plastic Test Tube with Screw Caps, 15mL Sterile Test Tubes with Lids, 15 mL Falcon Tubes with Printed Graduation and Write-on Spot

Great value. I use these for banking frozen yeast with glycerin and they've worked perfectly. They seal nicely and don't leak, just don't overfill.

Atendeu ao meu propósito que era acondicionar grãos de café no freezer. Gostaria que o plástico fosse mais robusto.

Bought these for a few different science experiments for my kids science birthday party. They are high quality, durable, and leak proof. Great value for price.

These worked great for my insect collection. They stand up that’s helpful when using liquid.

GREAT COMPANY & VALUE! I wasnt sure when I first bought some pipette tips and PCR tubes from these guys almost 2 years ago. But if they were cruddy then I could always return. But no need! The ONLY gripe is their 10uL filter tips which the filters aren't always seated properly and filling up 10uL sometimes touches the filter and ruins the sample being measured and used. But the materials are high quality and I even saw these guys have a booth at the ADLM (AACC) floor last year! I actually like their PCR tubes better than USA Scientific and others ive tried. Well done!