Screw thread vials & closures for HPLC,GC,MS appliions. There’s a Aijiren screw top vial for every HPLC,GC,MS instrument,appliion,and budget. Our screw top clear and Aijiren glass vials and plastic screw top vials are available in 8mm,9mm,10mm,and 13mm screw threads. Quote Now.