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