5) 8mm screw black open top pp caps. China HPLC Vial Manufacturers, Suppliers and Factory . 3)Advantages * Wide opening 9-425 vials can be used on all common autosamplers, perfectly compatible with aijiren, aijiren Tech, aijiren Technology, Varian, etc. * Vials with intergrated micro-insert are available in clear and amber glass. 2ml clear glass