Chrominex clear chromatography vials with cap for HPLC. Wide Opening hplc vial inserts with high quality chromatography vials supplier USA The Complete Guide of Autosampler Vials,Caps & Inserts Clear Glass 24-400 Thread Storage Vial,Sample Vial,Clear Glass 24-400 Thread Storage Vial,20ml Capacity,27.5mm I. Inquiry.