Aijiren’s 2mL amber glass screw-top autosampler vials are all 5.0 type borosilicate glass. 9mm Amber Glass Screw Thread HPLC Vial for SHIMADZU The 2ml HPLC PP Vial and Cap provided by Aijiren is usually 9mm in diameter, because the 9mm HPLC Vial can match most HPLC Autosamplers