Aijiren Amber Storage Sample Vials for Sale. 9mm 2mL HPLC Vials are made with a 6.0mm opening. These 9mm 2mL HPLC Vials are designed to work on most autosamplers that use 12mm x 32 mm crimp style vials. They offer the convenience of screw thread vials for instruments that were originally designed for crimp top vials.