Wheaton sample vials, 20ml or 0.68oz amber, 24-400 finish with ptfe faced 14b rubber liner, type i borosilicate glass. Vials with caps attached packaged in partitioned trays clear and amber vials made from borosilicate glass shorty vials feature a low profile for greater stability choice of screw cap liners for aqueous or organic samples. Warning: this product can expose you to chemicals including tetrafluoroethylene, which are known to the state of california to cause cancer. Prop 65 warning