9mm Screw Top HPLC Vial for aijiren Tech–aijiren Vials for 9mm thread caps, septums, 9mm 2ml HPlc screw vials are specifically designed for use with aijiren Tech and other rotating or robotic arm samplers. 9mm2ml Hplc screw vials are manufactured in transparent glass, Type 1 Class A or Amber, Type 1 Class B borosilicate glass and contains a write patch for sample identification.