At the same time, this amber hplc vial is equipped with PP #screwcap. All of cap and vials are in wholesale price. How to wash the needle. 2ml Clear HPLC Screw Vials with Blue Caps for Sale–Lab . 2ml Clear HPLC Screw Vials are preferentially used on instruments of the following manufacturers: Jasco, Perkin Elmer, Shimadzu, Varian, Waters, etc