2019/09/23 · Certified Kits, screw thread vials, 12 x 32 mm, 9 mm thread, unassembled, pkg of 100 volume 2 mL, clear glass vial, PTFE/silicone septum (bonded to cap); General Chromatography - Aijiren The threads on the Aijiren Certified screw vials are designed precisely to match the threads on Aijiren Bonded, pre-slit PTFE/silicone septa Blue.