Vials, screw top, amber glass (vial only) volume 40 mL, amber glass vial, thread for 24-400, pkg of 100 ea: 27400-U: Insert for 2 mL standard opening vial, 4.6 mm I.D. volume 0.05 mL, conical clear glass, bottom spring, O.D. × H 4 mm × 25 mm, pkg of 100 ea: 27401: Screw cap