The next question to be considered is the size of the 2ml HPLC Vials. 2ml HPLC Vials can be used for manual injection and autosampler injection.When you need to purchase matching HPLC Vials for your autosampler, you need Check the size of the autosampler to purchase a suitable HPLC Vials.Aijiren has 8mm, 9mm, 10mm, 11mm caliber HPLC Vials, 11mm HPLC Vials are divided into Snap Top Hplc Vials