2ml Vials for HPLC Manufactures WHEATON-Aijiren 2ml Sample Vials High quality clear shell vials poly cap-Aijiren Hplc Vials 8mm clear shell vials poly cap Wheaton-HPLC Vial Inserts. Cap finish is 15 mm Shell vials are designed for use with autosamplers that require 15 x 45 mm vials.