Ks-Tek Sterile Empty Vials with Self Healing Injection Port,with Aluminum Plastic Cap,Sterile Package (1ml Clear,10)

you can't really use them efficiently. I tried using them for material for injection like weight loss medication, but they are not high quality. don't get me wrong, they do the job if you're a doctor like me, but I wouldn't recommend them.

Every time I use an insulin syringe to draw the liquid from the vial, the needle seems to get damaged or blunted as it passes through the rubber seal. As a result, the needle is no longer sharp and it hurts when I inject. It appears that the rubber seal on the vial may not be suitable for use with insulin syringes

Ótimo, veio cada um em uma embalagem. Que pena que na achei aqui em João Pessoa. A entrega foi rápida, mesmo vindo de fora. Super recomendo.

These vials are well made and have a quality stopper. The large size means that you can make fewer batches of your serums or lab solutions. The amber bottle also protects light sensitive chemicals.

As described

These are actually really nice quality vials. They arrived well packaged and everything looked clean and properly sealed. The glass feels sturdy and the stopper/cap fits securely. I especially like the self-sealing top because it feels solid and reseals well after being punctured. No issues with leaking so far either. The overall quality is better than I expected for something ordered from Amazon. They’re simple, well made and do exactly what I needed them for. Would definitely order again if I need more.