I-8-425 Screw Cap ene-Septa ye-8mm Vial inikeza ukuhambisana nezinhlobonhlobo zezicelo zaselabhorethri. Zivame ukusetshenziswa kumasu we-chromatography, njenge-High-Performance Liquid Chromatography (HPLC). Lawa ma-screw cap afanele kokubili ukuhlaziya okuvamile kanye nezinhlelo zokusebenza zocwaningo, ukuqinisekisa imiphumela ethembekile nephindaphindekayo.