Insert for 2 mL standard opening vial, 4.6 mm I.D. conical | Sigma Find Insert for 2 mL standard opening vial, 4.6 mm I.D. conical and related products for scientific research at MilliporeSigma Product Number Product Description SDS 27400-U volume 0.05 mL, conical clear glass, bottom spring, O.D. × H 4 mm × 25 mm, pkg of 100