The associated 2ml 10mm chromatography amber vials and closures come with your choice of septa constructed from either PTFE silicone or natural red rubber. Vial Dimension: 11.6*32mm Vial Volume: 1.5-2.0ml Vial Material: Borosilicate Glass/Glass Type 1 Application: Lab consumables for analysis Certification: ISO9001, SGS, COA