Standard Opening 2ml crimp micro vial hplc with cap for hplc 9mm 2ml Wide Opening Screw Vials-Quzhou Aijiren 9mm 2ml Wide Opening Screw Vials 9mm screw thread caps,septa,and vials are designed especially for use with micro vial hplc manufacturer''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