Feb 27, 2021 · To facilitate autosampler sampling, you can also choose a cap with a hole in the center. Ayjiren's 1.5ml hplc vials can be combined with micro inserts and is available in micro inserts in various sizes of 8mm, 9mm and 10mm. Basically, Idyrene products are 100 pieces/pack. It is recommended to purchase viaals packaged with caps and septas.