Wheaton sample vials, 25ml or 0.85oz clear, 22-400 finish with ptfe faced silicone liner, type i borosilicate glass. Septa of 5 mils of ptfe facing 120 mils of silicone is bonded to cap. Warning: this product can expose you to chemicals including tetrafluoroethylene, which are known to the state of california to cause cancer. Prop 65 warning