- 2ml clear wide opening crimp vial, 100PK 2021-08-16 Vial, crimp top, clear, certified, 2 mL, 100/pk. Vial size: 12 x 32 mm (11 mm cap) Aijiren 2mL crimp top vials are constructed from type 33 and type 51 COE borosilicate glass, with low metal content, to protect your sample from destabilizing or leaching.