9mm 2ml Wide Opening Screw Vials-Quzhou Lab Technology . 9mm 2ml Wide Opening Screw Vials. 9mm screw thread caps,septa,and vials are designed especially for use with lab vials supplier''s and other rotating or robotic arm samplers 2ml,12X32mm vials are manufactured of Clear. type 1 Class A or Aer,Type 1 Class B borosilie glass and include a write-in patch for sample identifiion