Home » News » HPLC Septa Cap » 9mm septa cap distributor UK Cheap 9mm chromatography vials with label for HPLC and GC 3. 2ml Amber autosampler vial,12mm Diameter, 32mm Height, 9-425 9mm screw top, and included blue ABS Screw Cap & Septa (White PTFE/Red Silicone Liner) 4.