We are a leading manufacture of HPLC /GC vials with caps and septa in China, exporting products to more than 80 countries for over 8 years. The septa could meet the HPLC,GC,LC / MS analysis requirements. Our professional team is always ready to serve. 300ul PP micro vial. Product Description. 1.Mouth-Diameter of Vials 8mm,9mm,11mm,13mm,17.5mm