Kashi Scientific 50mL Self Standing Centrifuge Tubes with Screw Cap Lid, Lab Grade Polypropylene Plastic, Skirted, Printed Graduation, Write-on Spot [50mL Self-Standing, 50]

I use these centrifuge tubes to collect biological sample with. The caps and tubes are good quality. They work well for both liquid and solid collection vessels. They are affordable and for my purposes, they are exactly what i need. I will buy more.

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.

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.

Good, as described

Good quality

These little plastic test tubes are perfect for pre-measuring coffee. I use them to portion out the right amount for each serving; I then freeze those servings, so you can enjoy premium coffee throughout the year without it going off. Super easy to clean and reuse.

I bought these for long-term storage of mycelium cultures on agar suspended in water. I filled them 1/2 full with water, and they withstood the pressure cooker @15 PSI for 20 minutes just fine. I’d buy them again if I ever need more. I would have preferred orange caps over blue so that sharpie writing would be more visible, but it’s not a flaw of the product.

Not sterile. The outer and inner bags of this product was punctured in multiple places, making the product no longer sterile. Do not purchase if you require sterile tubes.

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

False branding. Sold by Kashi Scientific from the US. However, the packaging says Ningbo Medical Instruments, made in China.