Home » News » HPLC Septa Cap » Aijiren crimp septa closure types Screw Top Vials, Caps and Kits | Thermo Fisher Scientific - KR Cap & septa closures for 9mm screw vials Caps with bonded septa resist dislodging during injection when using large diameter blunt needles Closures have the profile of a crimp or snap closure for compatibility with robotic autosamplers lifting the vials