Vials, screw top, clear glass (vial only) | Sigma-Aldrich 2021 - 07 - 06 marking spot, volume 2 mL, vial O.D. × H × I.D. 12 mm × 32 mm × 4.6 mm, thread for 8-425, pkg of × 100 ea. Pricing. 27081-U. marking spot, volume 2 mL, O.D. × H × I.D. 12 mm × 32 mm × 4.6 mm, thread for 8-425, pkg of 1000 ea. Pricing.