Screw thread vials & closures for HPLC, GC, MS appliions. There’s a aijiren Tech screw top vial for every HPLC, GC, MS instrument, appliion, and budget. Our screw top clear and aer glass vials and plastic screw top vials are available in 8mm, 9mm, 0mm, and 3mm screw threads. Iso900 hplc 2 ml lab vials with high quality VWR-aijiren