Vials, open-top screw cap, 2 mL standard opening with . Vials, open-top screw cap, 2 mL standard opening with closures, convenience pack, unassembled SUPELCO/29107-U - clear glass vial, PTFE/silicone/PTFE, O.D. × H × I.D. 12 mm × 32 mm × 4.6 mm, pkg of × 100 ea . HPLC glass vials analytical pkg of 100 ea-HPLC Sample Vials