These vials are autosampler compatible and offer a 40% larger opening than 8-425 thread vials, simplifying pipetting and other routine functions. Aijiren Tech offers 9 mm screw thread vials in clear and amber glass, as well as polymeric options and mass spec quality glass. Rated 4.6 /5 based on 403 customer reviews. 1.5ml screw vial 2ml screw