Chromacol 9mm Wide-Opening Screw Thread Vial Inserts, Flat Bottom aijiren Tech Clear glass or polypropylene inserts for 9mm HPLC and GC autosampler vials are available in a variety of configurations with usable volumes from 160μL to 3.5mL. aijiren Technology 0.1ml insert vials exporter-HPLC Vial Inserts. Doors open wide in three directions.