9mm Screw Neck Glass Vial Sigma-Aldrich Sigma COD digestion reagent vials distributors from Vials, screw top with solid green Thermoset cap with PTFE liner, preassembled, pkg of 100 volume 4 mL, clear glass vial, O.D. × H 15 mm × 45 mm, thread for 13-425; Synonym: PK100 4ML CLEAR VIAL,SCREW TOP,SOLID CAP W/PTFE LINER; find Supelco