Ks-Tek Sterile Empty Vials with Self Healing Injection Port,with Aluminum plastic Cap,Sterile Package (10, 2ml Amber)

I’ve been really happy with these so far. They arrived well packaged and every vial was individually sealed, which I always like to see with sterile items. Nothing looked damaged or contaminated when I checked them. The glass feels thicker than I expected and not cheap or flimsy. The aluminum caps also look like they were crimped properly, and I didn’t run into any leaking issues. The self-healing injection port seems to reseal well after use too. Overall, they seem well made and reliable. For the price this felt like a solid purchase, and I’d order them again if I need more.

Injecting original serum into vials went fine but subsequent efforts to withdraw from syringe resulted in original puncture venting air into serum. In other words, the butyl rubber stopper has no self healing or flexible traits allowing original puncture to close. Original puncture gauge was extremely thin. Don’t waste your money!