100pcs Autosampler Vials 2ml HPLC 9-425 Aer Sample Glass 9-425 Screw Vials – 2ml Hplc Vials with unique thread design ensures consistent seal and can be reused, not volatile, easy to use, Aer vial with large writing patch for sample identifiion and it with ISO 9001 certified. glass vials and caps with patch for waters hplc China