Ks-Tek Sterile Empty Vials with Self-Healing Filler with Flip-off Aluminum Cap Sterile Package (10ml, 10)

Would have been better if lids weren't on

The KS-Tek 10 mL individually wrapped sterile vials meet professional lab handling standards with excellent consistency and build quality. Each vial arrives individually sealed, maintaining sterility integrity and minimizing contamination risk during storage and staging. The borosilicate glass construction is uniform in wall thickness, free from visual defects, and demonstrates solid structural durability under standard laboratory handling conditions. The butyl rubber stoppers are well-centered and properly seated, providing reliable reseal performance after multiple needle punctures without excessive coring or fragmentation. Crimp seals are evenly applied with consistent compression, ensuring secure closure and pressure stability. Volume calibration appears accurate and repeatable across units, and the interior surface is clean with no visible particulate or residue. All units inspected were free of cracks, chips, or sealing irregularities. For laboratory, research, or controlled compounding applications requiring sterile 10 mL containment, these vials provide dependable quality control and professional-grade reliability.

Perfect for what I need. Quality is great. Seal is good. Definitely better than other ones I bought where the vacuum doesn't exist and the seal doesn't actually heal properly. Would buy again. Just wish it were cheaper and came with a case to hold vials.

Just what I needed and arrived quickly

Works exactly as intended, not sure about how sterile these are, but if your purchasing vials, chances are the chemicals your putting in them will be more harmful to you then the vials not being 100% sterile.