Insert for HPLC Chromatography Vial, 150ul micro 6x29mm glass inserts with polyspring 100/pk Iso9001 PES filter vials on stock verex-HPLC Vials Supplier. Certified Vials, Caps, Septa, & Inserts - NET Core. adversely affect your chromatography, leading to mystery peaks, loss of analytes, Microsampling (center-draining and fused-insert vials).