The vials meet all requirements of US, EU, and JPN Pharmacopia. Seal these screw top vials with 9 mm screw caps and septa. Performance Level 1 Vials – for Everyday Analyses . Have a single wave on the vial; Convenient write-on patch on the vials; Are suitable for QA/QC applications using core detectors; Suitable for GC and HPLC/UHPLC applications