May 28, 2021 · The design of Hawach Scientific Co., Ltd screw thread top vials are developed from Europe and the United States, and the design feature is easy to use, especially the use of an automated sample introduction system. Hplc Vials at Thomas Scientific Hplc Vials found in: Clear Autosampler HPLC Vials, 2.0mL, Autosampler HPLC Vials, 2.0mL