Certified 2.0 mL Screw-Thread Vials: Certificates enclosed with each kit.Vials of clear or amber borosilicate glass with ID marking spots.Closures with pre-inserted septa.Each kit sealed for integrity.Certification Parameters Include:Vial Dimensions: Height, diameter, bottom thickness, neck length, thread profile, and annealingCap/Septum: Diameter, height, thread integrity, center flash, septa insertion, sealing/resealing test, residue by headspace GC, and extractablesChemical Test: LC Test: nonvolatile residueGC Test: volatile residue